Editing Seven

{{References}}
{{Title|List of references to "seven" in the ''Halo'' series}}
[[File:VWNUM7.jpg|right|200px]]
{{Quote|Some of you may be wondering - "What's up with this unhealthy obsession with the number 7?"  This page offers ''some'' insights.|[[Brian Jarrard]], linking to this very page<ref>[http://www.bungie.net/News/content.aspx?cid=14650 '''Bungie.net''': ''Bungie Day Tribute'']</ref>}}

{{Quote|Cause that's the best number. It's like rock. Nothing beats rock or 7.|[[Michael Wu]]}}

[[Bungie]] has long enjoyed using the number '''seven''' ('''7''') in its games in many prominent ways<ref>[http://marathon.bungie.org/story/seven.html '''Marathon.Bungie.Org''': ''The Number Seven'']</ref>. [[Ensemble Studios]] and authors also have certain obvious seven references in their works about ''Halo''. While almost anything can be made into a reference to something with effort or constructed accidentally through [[wikipedia:pareidolia|pareidolia]], the following attempts to list the intentional references Bungie placed into ''Halo'' for the fans to find. As such, not all of these references may be fully accurate, and many of them may be proven to be false at any time. Bungie's obsession with the number seven may be attributed to (or be a determining factor) why [[John-117]] is considered lucky, as 7 is considered a lucky number. In spite of the fact that the number seven is featured extensively in Bungie's work, it has generated an aura of [[wikipedia:apophenia |apophenia]]. This cultural nuance can be compared to the [[wikipedia:23 enigma|23 enigma]].

==''Halo: The Fall of Reach'' (and ''Halo: Fall of Reach'')==
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*[[Lieutenant, Junior Grade]] [[Jacob Keyes]] graduated from UNSC OCS '''7''' weeks before being assigned to observe SPARTAN-II candidates with Dr. Halsey<ref name="for19">'''Halo: The Fall of Reach''', ''page 19''</ref>
*During Keyes's second year at OCS he was involved in an incident which killed fourteen [[Ensign]]s.<ref name="for19"/> 14/2='''7'''
*John attended [[Elysium City Primary Education Facility Number 119]] before being abducted for the [[SPARTAN-II Program]].<ref>'''Halo: The Fall of Reach''', ''page 21''</ref> 119/7=17, 1x7='''7'''.
*John's SPARTAN tag is 117 (1x1x7='''7''').<ref>'''Halo: The Fall of Reach''', ''page 22''</ref>
*Deja showed the children a hologram of a meadow with '''7''' wolves hunting a moose.<ref>'''Halo: The Fall of Reach''', ''page 43''</ref>
*On October '''7''', 2525, three [[UNSC]] vessels were sent to investigate why the [[Colonial Administration Authority]] had lost contact with the [[Harvest]] system. 2+5=7<ref>'''Halo: The Fall of Reach''', ''page 96''</ref>
*The Medical Facility "Hopeful" was gone for '''7''' days.{{citation needed}}
*The human colony [[Jericho VII]] is introduced. VII = '''7''' in Roman Numerals. 
*A UNSC [[UNSC destroyer|destroyer]] was only '''7''' meters longer than a [[UNSC frigate|frigate]].<ref>'''Halo: The Fall of Reach''', ''page 139''</ref>
*[[Lieutenant]] [[Hall]] has written '''7''' physics papers on Slipspace communications.<ref>'''Halo: The Fall of Reach''', ''page 140''</ref>
*Four [[Covenant]] frigate ships are an even match with '''7''' UNSC destroyers.<ref>'''Halo: The Fall of Reach''', ''page 144''</ref>
*Hall reports a collision in '''7''' seconds.<ref>'''Halo: The Fall of Reach''', ''page 149''</ref>
*After the {{UNSCship|Cradle}} sacrificed itself, the rest of the fleet destroyed '''seven''' Covenant ships with their MAC volley fire.<ref>'''Halo: The Fall of Reach''', ''pages 192-193''</ref>
*Jacob Keyes could only count '''7''' UNSC vessels still intact after the [[Battle of Sigma Octanus IV]].<ref>'''Halo: The Fall of Reach''', ''page 199''</ref>
*When the SPARTANs test the MJOLNIR suit with shields, when John-117 gets ready to go outside there are '''7''' [[Orbital Drop Shock Trooper|ODST]]s standing outside around the tent.<ref>'''Halo: The Fall of Reach''', ''page 257''</ref>
*The {{UNSCship|Pillar of Autumn}} carried '''7''' [[C709 Longsword-class Starfighter]]s.{{citation needed}}
*'''7''' Covenant frigates were pursuing the ''Pillar of Autumn''.<ref>'''Halo: The Fall of Reach''', Epilogue</ref>
*On page 11 of ''[[Halo: Fall of Reach - Boot Camp]]'', Halsey is seen looking at a hologram of John-117's physique, with a few genes labeling around it. Each of these labels are '''seven''' nucleotides long.
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==''Halo: Combat Evolved'' (and ''Halo: The Flood'')==
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*When the Chief's shield is down, it takes fourteen seconds to fully recharge - '''seven''' seconds while the shield flash red, and '''seven''' seconds while recharging.
*Master Chief (and some Marines) board [[Class-3 Enclosed Heavy Lifeboat|lifeboat]] #52. 5+2='''7'''
*At the beginning of the [[Halo (Halo: Combat Evolved level)|second level]], there are '''seven''' dead bodies around John-117 (six [[UNSC Marine Corps|marines]] and the [[bumblebee|lifeboat]] pilot).
*On the level "[[The Silent Cartographer]]," at [[Bravo 022]]'s crash site, there is a fully loaded rocket launcher (the first in the game) and '''7''' spare rockets.
*At the beginning of "The Silent Cartographer," John-117 stormed the beach with '''seven''' marines.
*There are '''14''' [[Type-29 Anti-Infantry Stationary Gun|Shade]] turrets on the [[campaign]] level ''[[Truth and Reconciliation (level)|Truth and Reconciliation]]''. 14/2='''7'''.
*In the cavern with the bridge in the level "[[Assault on the Control Room (level)|Assault on the Control Room]]", there are '''seven''' dead marines as well as some dead Covenant troops.
*[[Installation 04]]'s [[monitor]] [[04-343 Guilty Spark]] is introduced. His name is derived from the value 343, which equals to '''7'''<sup>3</sup>.
*There are '''7''' [[blast door]]s leading to the [[Activation Index]] in the [[Library]].
*On the level ''[[Keyes (level)|Keyes]]'', once the Chief gets back into the Gravity Lift bay, there are '''7''' dead Grunts around.
*The [[Proto-Gravemind]] has '''7''' tentacles.
*After destroying the fusion core on the ''Pillar of Autumn'', Master Chief drives a [[M12 Light Reconnaissance Vehicle|Warthog]] through a Class '''7''' service corridor.<ref name="maw">'''Halo: Combat Evolved''', campaign level ''[[The Maw]]''</ref>
*The last Longsword on the ''Pillar of Autumn'' was in [[Launch Bay 7|Launch Bay '''7''']].<ref name="maw"/>
*Cortana's warns the Chief about the gap in the trench starts when he is '''7'''00 meters away from Launch Bay 7.<ref name="maw"/>
*On [[Easy]] difficulty, it takes exactly '''7''' shots from a [[Type-25 Directed Energy Pistol|Plasma Pistol]] or a [[Type-25 Directed Energy Rifle|Plasma Rifle]] to kill a [[Sangheili]].
*It takes at least '''seven''' needles from the [[Type-33 Guided Munitions Launcher|Needler]] to make an explosion.
*On the third page of the manual explaining the HUD (page 15), a screenshot with an explanation of the scope shows '''7''' extra bullets in the sniper rifle.
*In the [[Halo: Combat Evolved: Sybex Official Strategies & Secrets|Sybex official strategy guide]], in the designer tips for one of the multiplayer maps it is said the survival rate on the bottom of the map is around '''7''' seconds<ref>'''Halo: Combat Evolved: Sybex Official Strategies & Secrets''', ''page ??''</ref>
*[[Carol Rawley|Carol "Foe Hammer" Rawley]] is part of a group of '''7''' people (3 pilots, 3 ground crew, and herself) who fled the ''Pillar of Autumn'' by retrieving their Pelicans rather than taking lifeboats.<ref>'''Halo: The Flood''', ''page 31''</ref>
*"Twelve shots rang out, and '''seven''' Grunts fell."<ref>'''Halo: The Flood''', ''page 53''</ref>
*Chapter '''7''' of ''Halo: The Flood'' has the mission time listed as '''7''' cycles ('''49''' units) [[Covenant]] time. 49 = 7<sup>2</sup><ref>'''Halo: The Flood''', ''page 177''</ref>
*Silva wishes he had '''7''' Lt. McKay's.<ref>'''Halo: The Flood''', ''page 237''</ref>
*All the terminals' number codes on the Pillar of Autumn have a '''7''' on them.{{citation needed}}
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==''Halo: First Strike''==
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|content = *There are '''7''' Covenant ships in the system after Halo's destruction.<ref name="fs36">'''Halo: First Strike''', ''page 36''</ref>
*The Covenant flagship ''[[Ascendant Justice]]'' has '''seven''' plasma turrets.<ref name="fs36"/>
*After Corporal [[Locklear]] brings the ammo up from the [[Pelican]], there are '''seven''' grenades in the crate.<ref>'''Halo: First Strike''', ''page 53''</ref>
*Cortana describes subsection '''seven''' of the Cole Protocol as the reason they cannot immediately return to Earth aboard ''Ascendant Justice''<ref>'''Halo: First Strike''', ''page 94''</ref>
*After [[Fred]] and [[Kelly]] steal two [[Wraith]]s, they destroy '''seven''' other Wraiths.<ref>'''Halo: First Strike''', ''page 114''</ref>
*There are '''seven''' doors leading to adjacent offices and surgical bays when Dr. Halsey first enters the medical wing of [[CASTLE Base]].<ref>'''Halo: First Strike''', ''page 122''</ref>
*As she is deleting Araqiel, Dr. Halsey taps the level '''seven''' security barriers.<ref>'''Halo: First Strike''', ''page 127''</ref>
*The ''Ascendant Justice'' exits Slipspace '''seven'''  hundred thousand kilometers from the Epsilon Eridani System center.<ref>'''Halo: First Strike''', ''page 154''</ref>
*CPO Mendez was scheduled to meet the Spartans 0'''7'''00 hours after they captured the flag from Tango Company.<ref>'''Halo: First Strike''', ''page 165''</ref>
*There were '''seven''' [[Robotic rover|service drones]] aboard the ''[[Gettysburg]]''.<ref>'''Halo: First Strike''', ''page 208''</ref>
*After John-117 leaves the medical room Dr. Halsey is in, she instructs Cortana to lock the door and "boost counter-intrusion measures to level '''seven'''." <ref>'''Halo: First Strike''', ''page 246''</ref>
*[[Admiral Danforth Whitcomb]] bluffs [[Governor Jacob Jiles]] by saying they had '''7''' working plasma turrets.<ref>'''Halo: First Strike''', ''page 262''</ref>
*The dead crew of the ''Gettysburg'' is placed in cargo bay '''seven'''.<ref>'''Halo: First Strike''', ''page 268''</ref>
*After exiting slipspace in a captured Covenant dropship, the Spartans find themselves near two hundred forty-seven Covenant ships. As they are watching, '''seven''' more appear.<ref>'''Halo: First Strike''', ''page 298''</ref>
*The Master Chief sets his [[Lotus anti-tank mine]] detonator for '''seven''' seconds. <ref>'''Halo: First Strike''', ''page 314''</ref>
*C-'''7''' foaming explosive is used by the Spartans and Locklear.<ref>'''Halo: First Strike''', ''page ??''</ref>
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==''Halo: Ghosts of Onyx''==
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*The [[SPARTAN-III Program|SPARTAN-IIIs]] of [[Beta Company]] had been launched from [[Slipspace]] '''seven''' hours previous. <ref>'''Halo: Ghosts of Onyx''', ''page 16''</ref>
*'''Seven''' Covenant cruisers appear during [[Operation TORPEDO]]. <ref>'''Halo: Ghosts of Onyx''', ''page 22''</ref>
*"'''Seven''' other men sat at a card table, shaking off the effects of the flash-bangs."<ref>'''Halo: Ghosts of Onyx''', ''page 32''</ref>
*"Three hundred Spartans hit the dirt at 0'''7'''00."<ref>'''Halo: Ghosts of Onyx''', ''page 84''</ref>
*The target of [[Operation: PROMETHEUS]] was asteroid [[K7-49|K'''7'''-49]].<ref>'''Halo: Ghosts of Onyx''', ''pages 83-84''</ref> 7<sup>2</sup>=49
*After two days the Spartan-III's of Alpha Company had managed to disable '''7''' of the reactors.<ref>'''Halo: Ghosts of Onyx''', ''page 85''</ref>
*"On day '''seven'''," the Admiral said, "additional Covenant reinforcements arrived."<ref>'''Halo: Ghosts of Onyx''', ''page 86''</ref>
*Kurt trained the Spartan-III's of Alpha Company for '''7''' years.<ref>'''Halo: Ghosts of Onyx''', ''page 87''</ref>
*"We are presently '''seven''' kilometers over the planet's surface," the AI said.<ref>'''Halo: Ghosts of Onyx''', ''page 161''</ref>
*Before casualties, there were '''7''' active Spartan-III's on Onyx ([[Tom]], [[Lucy]], and Team Saber).{{citation needed}}
*"What [[Sangheili]] Major would dare disobey a [[Ship Master]] who had led '''seven''' glorious campaigns against their enemies?" <ref>'''Halo: Ghosts of Onyx''', ''page 189''</ref>
*After boarding [[Bloodied Spirit]] Fred's MJOLNIR suit has only '''seven''' minutes of air remaining.<ref>'''Halo: Ghosts of Onyx''', ''page 218''</ref>
*When Bloodied Spirit is attacked by Onyx Sentinels, the Sentinels move into lines of '''seven'''. '''Seven''' of these lines then combine into an elongated triangle and fire. <ref>'''Halo: Ghosts of Onyx''', ''page 232''</ref>
*Chapter 27 begins at the '''seventh''' cycle, 49 units, Covenant time. 7<sup>2</sup>=49.
*The [[Unggoy]] [[Kwassass]] had served '''seven''' years in the Covenant. <ref>'''Halo: Ghosts of Onyx''', ''page 236''</ref>
*The structure where the Spartans land is a '''seven'''-sided faceted dome with '''seven''' arches.<ref>'''Halo: Ghosts of Onyx''' ''page 270''</ref> Inside are '''seven''' flat surfaces, each the size of carrier landing decks. <ref>'''Halo: Ghosts of Onyx''' ''page 271''</ref>
*"It will take '''seven''' minutes in this orbit to cover that area."<ref>'''Halo: Ghosts of Onyx''', ''page 291''</ref>
*"'''Seven''' MAC rounds struck the two lead destroyers in the Covenant line..." <ref>'''Halo: Ghosts of Onyx''', ''page 297''</ref>
*"The bulbous hull of a Covenant Seraph single ship appeared, then another Seraph appeared, then '''seven''' more..." <ref>'''Halo: Ghosts of Onyx''', ''page 305''</ref>
*"The '''seven''' Sentinels adjusted their aim and their spheres glowed red, amber, and then glistening gold."<ref>'''Halo: Ghosts of Onyx''', ''page 321''</ref>
*Dr. Halsey said the portal would close in 1 hour, 17 minutes, this is equal to '''77''' minutes.<ref name="goo311">'''Halo: Ghosts of Onyx''', ''page 311''</ref>
*The teleportation pads around Onyx are '''seven'''-sided.<ref name="goo311"/>
*"Shockwave from surface detonation impacting far side of the moon in '''seven''' seconds," Durrono said.<ref>'''Halo: Ghosts of Onyx''', ''page 378''</ref>
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==''Halo 2''==
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*In the [[Halo 2 announcement trailer]], when Master Chief walks in to hanger and launches himself into space, above the door to the hanger is labelled "A-0'''7'''". 
*There is a faint '''7''' on the MJOLNIR Mark IV helmet.{{verify}}
*There is a clearly visible '''7''' scratched into the left cheek of [[Miranda Keyes]].
*Sergeant [[Banks]]' communicator is engraved with the Hindi word for '''7''', written in the Hindi script.
*When the {{UNSCship|In Amber Clad}} was in the Battle of Earth numerous units from the '''77'''th Marine Regiments are on board.
*The ODSTs seen in-game belong to the [[7th Shock Troops Battalion|'''7'''th Shock Troops Battalion]].
*There is a '''7''' on the lower part of a Pelican's ramp.
*[[Installation 05]]'s monitor, [[2401 Penitent Tangent]] is introduced: 2401 is '''7'''<sup>4</sup>. It can also be read as 2+4+0+1='''7'''.
*The [[Gravemind]] speaks mostly in heptameter, a poetic style with '''7''' meters per line.
*In ''Halo 2'', there are '''7''' Covenant races seen: [[Unggoy]], [[Kig-yar]], [[Yanme'e]], [[Mgalekgolo]], [[Jiralhanae]], [[Sangheili]], and [[San 'Shyuum]].
*In ''Halo 2'', there are '''7''' Covenant vehicles: Ghost, Spectre, Wraith, [[Type-29 Troop/Vehicle Transport|Shadow]], Banshee, [[Type-52 Troop Carrier|Phantom]] and the [[Type-47 Ultra Heavy Assault Platform|Scarab]].
*The symbol on the Banshees' wings is made up of '''7''' red blocks.
*'''7''' hexagons make up the zoomed targeting reticule of the [[Type-51 Carbine|Covenant Carbine]].
*Firing the [[Plasma Rifle]] until it overheats will drain '''7''' power units, assuming it is not burst fire.
*Firing the [[Sentinel beam]] until it overheats will leave a remaining charge of '''77'''.
*There are '''7''' drivable vehicles in the game: the [[M808B Main Battle Tank|Scorpion]], [[Type-26 Assault Gun Carriage|Wraith]], [[Type-46 Infantry Support Vehicle|Spectre]], [[M12 Light Reconnaissance Vehicle|Standard Warthog]], [[M12G1 Light Anti-Armor Vehicle|Gauss Hog]], [[Type-32 Rapid Assault Vehicle|Ghost]], and [[Type-26 Ground Support Aircraft|Banshee]].
*In the ''[[Halo 2 Vista]]'', the "[[Silent But Deadly]]" [[Achievement]] requires the player to kill '''7''' enemies from behind without being spotted.
*The player fights in '''7''' levels as the Master Chief: ''[[Cairo Station (level)|Cairo Station]]'', ''[[Outskirts]]'', ''[[Metropolis]]'', ''[[Delta Halo (level)|Delta Halo]]'', ''[[Regret]]'', ''[[Gravemind (level)|Gravemind]]'' and ''[[High Charity (level)|High Charity]]''.
*[[Cairo Station]]'s serial number '''ODA-142''' contains a possible '''7''' reference (1+4+2='''7'''). 
*The {{UNSCship|In Amber Clad}}'s [[Hull Classification Symbol]] is '''FFG-142''', which is a possible '''7''' reference. (1+4+2='''7''').
*The Covenant [[antimatter charge]] that was brought onboard Cairo Station took '''7''' seconds to detonate.<ref>'''Halo 2''', campaign level ''[[Cairo Station (level)|Cairo Station]]''</ref>
*In ''[[Outskirts]]'', a sign bearing the number '''7''' can be found nailed to the wall near the [[Halo 2 Skulls#Blind|Blind Skull]].
*On ''Outskirts'', in the small dark room where the [[Halo 2 Skulls#I Would Have Been Your Daddy (IWHBYD)|IWHBYD skull]] is located, there is a number '''7''' on the wall.
*To obtain the IWHBYD skull, one must face '''7''' waves of Sangheili Ultra, with '''7''' Sangheili in the '''7th''' wave.
*In the level ''Outskirts'', there is a total of '''7''' Shadows.
*There are '''7''' Phantoms in the levels ''Outskirts'' and ''Metropolis'' combined.
*Throughout the levels ''Outskirts'' and ''Metropolis'' the player can find numerous cases of [[VX 7 nerve gas|VX '''7''' nerve gas]].
*There are '''7''' levels of caskets in the [[Mausoleum of the Arbiter]].<ref>'''Halo 2''', campaign level ''[[The Arbiter]]''</ref>
*In the level [[Delta Halo (level)|Delta Halo]] there are '''7''' dead ODST's scattered throughout the level.
*In a deleted scene, a longer version of the cutscene at the start of ''Sacred Icon'', Truth and the Arbiter were viewing '''7''' murals that showed how the Covenant had grown.
*John-117 faces '''7''' pairs of [[Mgalekgolo]] in the campaign level ''Gravemind''.
*In the level ''[[The Great Journey]]'' there are '''7''' [[Type-27 Anti-Infantry Stationary Gun|Shade turrets]].
*At the end of the credits the "t" is replaced with a '''7''' in the sentence "And a whole load of people we didn't get time to 7hank".
*The phone booths on [[Terminal (level)|Terminal]] are all numbered '''7'''.
*The multiplayer map ''Terminal'' has a large '''7''' on the station building. 
*The Broadcasting station for the multiplayer map ''Terminal'' is [[Channel 7]].
*On ''[[Headlong]]'', near the bridge which connects to the Needler Building, there is a piece of paper with the number '''7''' pinned on the wall.
*In ''Headlong'' the number '''7''' is nailed by the side of the door on the building that contains the [[Type-1 Energy Weapon/Sword|Energy Sword]].
*On the level ''Zanzibar'', the Xbox's clock must be on '''7''':0'''7''' for the player to see the [[Zanzibar Easter eggs|Easter egg of Ling-Ling's head]].}}

==''Halo 3''==
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*In the background of the [[Halo 3 Collector's Edition|Collector's Edition]] of Halo 3, the door behind the Chief has a '''7''' written on it.
*In an ad for the ''Halo 3'' guide that occasionally shows up on Bungie.net, "0'''7'''" is stenciled in white on the [[Pelican]] behind the Master Chief. The art is also used as the cover art of Collector Edition's game manual.
*There are two '''sevens''' on the side of a [[Unggoy Minor]]'s [[Unggoy combat harness|armor]].
*There are '''7''' scoped weapons: [[BR55 Heavy Barrel Service Rifle|Battle Rifle]], [[Sniper Rifle System 99D-S2 Anti-Matériel|Sniper Rifle]], [[Type-50 Sniper Rifle System|Beam Rifle]], [[Type-51 Carbine|Covenant Carbine]], [[Rocket Launcher|M41 Surface-to-Surface Rocket Medium Anti-Vehicle/Assault Weapon]], [[Type-33 Light Anti-Armor Weapon|Fuel Rod Gun]], and [[M6 Grindell/Galilean Nonlinear Rifle|Spartan Laser]].
*The [[M6G Personal Defense Weapon System|M6G Magnum]] has a [[Korea]]n Hangul symbols on the barrel, and the very bottom of the mag. When reflected, it translates to the number '''7'''.
*The [[M7/Caseless Submachine Gun|SMG]] has a scratch in the shape of a '''7''' (easier to see if weapon is aimed at sky or near a light source).
*A UNSC Marine remarked, “The casing is constructed of an unusual porous metallic compound. Shrapnel from the [[Type-2 Antipersonnel Fragmentation grenade|Spike Grenade]] reaches a temperature of approximately 270 to 315ºC and retains that heat for upwards of '''seven''' seconds. By design.” <ref>[http://www.bungie.net/News/content.aspx?type=topnews&link=BAGBruteGrenade '''Bungie.net''': ''Type-2 Antipersonnel Fragmentation Grenade'']</ref>
*There are '''seven''' symbols on each end of the handle on the Energy Sword.
*On the side of the Warthog, below where the driver and passenger get in, just above the side skirts, there are '''7''' dashes.
*The [[M831 Troop Transport|Troop Transport Warthog]] is shown to have a total of '''7''' seats, whereas in-game there are only 5 available slots.
*It takes '''7''' seconds of the [[AV-14 Hornet]]'s twin-linked rotary cannons to destroy a Warthog.
*The {{UNSCship|Forward Unto Dawn}} has the number '''7''' on the front of it.
*It takes '''7''' seconds from being infected by a [[Flood infection form]] to turn into a [[Flood combat form]].
*There are '''7''' levels that the [[Cortana Moments|Cortana and Gravemind Moments]] occur. 
*There are '''7''' [[Forerunner]] [[Terminal/Halo 3|terminals]] in total within the campaign.
*The [[Forerunner Dreadnought]] has 14 x 14 x 14 dimensions. 14 = '''7'''+'''7'''.{{citation needed}}
*In the level ''[[Crow's Nest (level)|Crow's Nest]]'', in the ops center, the emergency power generators on the far side of the room, where one needs to go to get the Black Eye Skull, have the writing "EPG 2401": 2401 is '''7'''<sup>4</sup>.
*At the beginning of the level ''Crow's Nest'', some of the monitors have "Sector 331" written in a corner. 3+3+1='''7'''.
*In the level ''Crow's Nest'', on the walkway above the barracks there is a box with a large red '''7''' written on it.
*In the level ''Crow's Nest'', a rocket has the number '''7''' on each side.
*In the level ''[[Tsavo Highway (level)|Tsavo Highway]]'', John-117 exits the base through door number '''7'''.
*In the level ''[[The Storm]]'', there are '''seven''' plates of metal grinding on the cranes used to board the first Scarab, including the elevators.
*There are '''seven''' pallets on the pathway with the [[LAU-65D/SGM-151|missile pods]] on the level ''The Storm''.
*The are '''seven''' pipes the player can walk into on the lake bed where the Scarab was fought.
*There are '''7''' pairs of monoliths around [[the Portal]].
*There are '''7''' usable vehicles on the level ''[[The Ark (level)|The Ark]]'', the seventh level of the game, including Arrival.
*In the room with [[Installation 00]]'s Cartographer, there are '''7''' trapezoids above the doors.
*In the opening sequence of the level ''[[The Covenant (level)|The Covenant]], there are '''7''' drop ships, 5 [[Pelicans]] and 2 [[Phantoms]].
*There are '''7''' [[Jiralhanae Chieftain]]s and [[Jiralhanae War Chieftain]]s combined in the level ''The Covenant''.
*In the level ''The Covenant'', there are '''7''' [[Sangheili]] assisting the UNSC forces (excluding the [[Thel 'Vadam]], [[N’tho ‘Sraom]], and [[Usze ‘Taham]]).
*On the level ''The Covenant'', the [[Prophet of Truth]] fired '''7''' projectiles from a [[Type-25 Carbine|Spiker]] in [[Commander]] Miranda Keyes' back to kill her.
*There are '''7''' [[Gravemind]] moments on the level ''[[Cortana (level)|Cortana]]''.
*In the level ''Cortana'', in the beginning of the cut scene in which Cortana is rescued, there is '''7''' seconds of silence before she says "You found me".
*The Spartan Laser given to the player to kill 343 Guilty Spark has a permanent charge of '''77'''.
*It takes '''7''' seconds for 343 Guilty Spark to explode after being dealt the fatal shot in the level ''[[Halo (Halo 3 level)|Halo]]''.
*During the [[Warthog Run]] in the level ''Halo'' there are '''7''' vehicles other than the Warthog: 4 [[Type-32 Rapid Assault Vehicle|Ghosts]], 1 [[M274 Ultra-Light All-Terrain Vehicle|Mongoose]] and 2 [[Type-25 Rapid Assault Vehicle|Choppers]].
*In the credits, Bungie frequently replaces the letter 't' with the number '''7'''.
*If one turns on the coordinates display during game play, the second coordinate during the credits is -'''7'''.'''777'''
*On the multiplayer map ''[[Sandbox]]'', the Golf Club is called a [[7 wood|'''7'''-wood]].
*Deaths that do not require two people have a '''seven''' second respawn when no other penalties are active.
*All of the computers placed in [[Forge]] display a very hard to read paragraph. However, it is easy to make out several 0''''7'''s in the writing.
*In matchmaking, there are '''7''' pieces of equipment that can be used.
*''[[Cold Storage]]'' is the '''seventh''' downloadable ''Halo 3'' map, and was released on [[Bungie Day]] ('''7'''/'''7''').
*In the [[Cold Storage#Transmission|Cold Storage Transmission]] the time elapsed since an outside agent accessed the delta site has an approximate '''seven''' year margin of error.
*There are '''7''' structures coming out of the bottom of the building the multiplayer level ''[[Epitaph]]'' is set in.
*The Multiplayer map ''Epitaph'' has '''7''' hologram projectors, 6 minor ones and a Guardian Sentinel resembling projector.
*In the multiplayer map "[[Foundry]]", at the wide end of the map there are 14 full squares in between the walls, '''7''' on each side.
*There are '''seven''' pieces of grating involved with the missile launcher scenery on ''[[High Ground]]'' (including the one placed under the aiming machine).
*On the 'fire point' sign on ''High Ground'' there are '''7''' licks of flame coming from the white triangle.
*There are '''7''' lines of text on the screen of the gate switch on ''High Ground''.
*[[Last Resort]] is set in [[Zanzibar Island]]'s [[Wind Power Station 7|Wind Power Station '''7''']], which houses [[Zanzibar Municipal Turbine 7|Municipal Turbine '''7''']].
*At the bottom of the 'pit of death' on the multiplayer level ''[[Orbital]]'', there are '''7''' purple lights randomly scattered (excluding the ring of 6 lights, which have a darker shade of purple).
*The [[Quito Space Tether]], where ''Orbital'' takes place, was officially given its name in the year [[2401]], exactly 32,196 days after its completion (including leap days).(2+4+0+1=7} ('''7'''<sup>4</sup>=2401 and 3+2+1+9+6=21 21/3='''7''')
*The center screen in the sword room on the multiplayer level ''[[The Pit]]'' features the name sector 331. 3+3+1=7.
*It takes '''7''' seconds for the screens in ''The Pit'' Ops Center to scroll through all of the visuals.
*There are '''7''' bellows of smoke on the horizon in the multiplayer map ''[[Rat's Nest]]''.
*In the multiplayer level ''[[Sandtrap]]'', the {{UNSCship|Aegis Fate}} has a number '''7''' surrounded in a star on the side.
*On ''Sandtrap'', there are '''7''' standing angled pillars on the long indoor walkway.
*The blue lights that shoot out of the [[Beam emitter]]s on ''[[Valhalla]]'' appear every 49 seconds. '''7'''*'''7'''=49
*There are '''7''' [[Vidmaster Challenges|Vidmaster]] achievements; 4 achievements can be found in ''Halo 3'' while the other 3 are in ''[[Halo 3: ODST]]''.
*There is the Vidmaster achievement "[[Vidmaster Challenge: 7 on 7|'''7''' on '''7''']]".
*The [[Legendary Map Pack]] banner on the official Bungie.net. There is a slogan saying: Tru'''7'''h. Carnage. Bungie.
*''[[The Art of Halo 3]]'' was released on November 25th, 2008 (2+5= '''7''').
}}

==Cortana Letters and Transmissions==
{{Main|Cortana Letters|Transmissions}}
*Cortana signs her second letter with seven 'X's and 'O's.
*Cortana sends eight emails. But [[Cortana Letters#Third Letter|Letter Three]] was likely never intended, so seven messages were planned.

==I Love Bees==
{{Main|I Love Bees}}
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*When the [[Apocalypso]] crashes, all communications in the solar system are disabled for about '''seven''' seconds.
*When players unlocked '''777''' axons, a voice-actor playing [[Melissa (AI)|Melissa]] joined the game.
*When [[Kamal Zaman]] accesses his voice mail, he has '''seven''' old messages.
*Hiro, reading a how-to book on dating, tells Kamal to skip to chapter '''seven'''.
*A part of the game had players guiding the [[Melissa (AI)|Sleeping Princess]] out of her "glass coffin", a prison in her mind appearing as a story-tale world. Players would have to guide her down various paths marked by signs with unusual markings. The correct paths are ''Deadly Sins'' (there are seven), ''Waves'' (seven seas), and ''Skinny Cow and Fat Cow'' (in the Bible, the Pharaoh had a dream about seven skinny cows that ate seven fat cows).<ref>'''[[Perdita's Story]]'''</ref>
*When [[Rani]] tries to start a [[chatter]] business with a friend [[Trevor]], their equipment only manages to produce 49. 49='''7'''<sup>2</sup>
**Rani leaves with 14. 14/2='''7'''
**Trevor planned to make chatters for '''7'''% of what they cost in convenience stores.
*As of 2004, [[Aunt Margaret]] had been beekeeping for '''seven''' years.
*[[Yasmine Zaman]]'s augmentations are performed in Lab '''7'''.
*Yasmine Zaman washed out of the Spartan II program at age 14. 14/2=7
*[[Margaret Efendi]]'s email address, later hijacked by the AIs, is ladybee777@hotmail.com
*[[Durga]] has [[George Shebura]] arrested on 14 charges of counterfeit. 14/2=7
*Later, George Shebura received "'''7''' more parking tickets" in one week.
*[[Hiro]] tells Kamal "that's like the '''seventh''' time today you've refused to answer your chatter."
*Durga analyzed Jersey's food-buying habits over the last '''7''' months.
}}

==''Halo: Contact Harvest''==
{{Main|Halo: Contact Harvest}}
*There were '''seven''' [[space elevator]]s of the [[Tiara]].<ref>'''Halo: Contact Harvest''', ''page 66''</ref>
*'''Seven''' main maglev train lines led out from each base of the space elevators.<ref>'''Halo: Contact Harvest''', ''page 76</ref>
*Prophet Senior Ministry staffers could manage to travel in their [[anti-gravity chair]]s in groups as small as '''seven'''.<ref>'''Halo: Contact Harvest''', ''page 149.</ref>
*During the evacuation of Harvest, [[Loki]] changed the five minute interval for the containers to '''seven''' minutes.<ref>'''Halo: Contact Harvest''', ''page 354''</ref>
*The first space elevator to collapse was the '''seventh''' elevator.<ref>'''Halo: Contact harvest''', ''page 371''</ref>
*[[Sif]]'s electronics were stored in '''seven''' towers in the Tiara's control room.<ref>'''Halo: Contact harvest''', ''page 309''</ref>

==''Halo: The Cole Protocol''==
{{Main|Halo: The Cole Protocol}}
*'''Seven''' ODST's were killed during the attack on the [[Redoubt]].

==''Halo Wars''==
{{Main|Halo Wars}}
*There are '''7''' [[Sangheili]] deactivating camouflage in the [[Halo Wars Announcement Trailer]].
*In ''Halo Wars'', both the [[Firebase#Fortress|UNSC Fortress]] and [[Citadel (Covenant)|Covenant Citadel]] possess '''7''' expansion sockets.
*There are '''7''' types of buildings for each UNSC and Covenant.
*In the beginning of level ''[[Relic Approach]]'', the lockdown on the [[Alpha Base (Harvest)|Alpha Base]] will not end and the main gate will not open until the player trains five more squads of marines, bringing the total to '''seven'''.
*When playing on [[Easy]] or [[Normal]] the player begins the level ''[[Arcadia City]]'' with '''seven''' units: six Hornets and [[John Forge|Sergeant Forge]].
*The player begins the level [[Scarab (level)|Scarab]] with exactly '''seven''' units: 2 [[M145D Mobile Artillery Assault Platform|Rhinos]], 2 Marine squads, 1 Scorpion, 1 Warthog, and Sergeant Forge.
*There are '''7''' power nodes that you can destroy to make the Super Scarab's searchlight move slower on the level ''Scarab''.
*The player begins the level ''[[Beachhead (Halo Wars level)|Beachhead]]'' with exactly '''seven''' units: 4 ODST squads, 1 [[Hellbringer]], Sergeant Forge, and [[Ellen Anders|Professor Anders]].
* The cryo pods in the last cutscene are row 3 and 4. 3+4=7
*Following the events aboard the {{UNSCShip|Prophecy}}, [[Sergeant]] [[John Forge|Forge]] required '''seven''' doses of anti-radiation treatment.<ref>'''[[Halo Wars: Genesis]]'''</ref>

==''Halo 3: ODST''==
{{Main|Halo 3: ODST}}
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*At approximately 10 seconds into the ''ODST'' trailer there are '''7''' [[Single Occupant Exoatmospheric Insertion Vehicle|SOEIV]]s burning in the atmosphere.
*In the Keep it Clean trailer, it takes the Superintendent '''7''' camera views to chronicle the Rookie's SOEIV pod crashing.
*In the Keep It Clean trailer, there are '''seven''' Jiralhanae in the Covenant patrol.
*In the Keep It Clean trailer, [[Prepare To Drop (music)|the soundtrack]] that plays is '''77''' seconds long or 1:17 minutes long, a '''seven'''/SPARTAN-117 reference.
*The Superintendent will change his face '''7''' times during the trailer (including its beginning emotion).
*There are '''7''' protagonists in ''Halo 3: ODST''.
*The Rookie's enlistment date is 0'''7'''/0'''7'''/254'''7'''. (0'''7'''/0'''7''') This is also a reference to [[Bungie Day]].<ref>[http://www.bungie.net/News/content.aspx?type=topnews&link=Halo3ODSTsquad '''Bungie.net''': ''Meet the Squad'']</ref>
*The [[M7S Caseless Submachine Gun]] features an integrated [[SS/M 49|SS/M '''49''']] suppressor. 49=7<sup>2</sup>
*There are '''7''' [[M313 Heavy Recovery Vehicle#Olifant|Olifants]] in the game, including the destroyed ones.
*There are at most '''7''' supply cache's available to the Rookie in the level ''[[Mombasa Streets]]''.
*The watchtower of the bridge outside the [[ONI Alpha Site]]'s compound is number '''07'''.
*In the beginning of the level ''[[Data Hive]]'', the Rookie starts on Sublevel 7.
*The number of the Olifant used by [[Veronica Dare]] and the [[Unidentified Huragok|Huragok]] containing [[Vergil]] is 49, or '''7'''<sup>2</sup>.
*In the ending cutscene of [[Coastal Highway (level)|Coastal Highway]] there are '''7''' Covenant cruisers above New Mombasa.
*In the [[Legendary]] Epilogue cutscene, there are '''7''' [[Huragok]] looking down into the Forerunner structure.
*In [[Firefight]], the player starts out with '''7''' lives.
*In the Firefight, there is a total of '''7''' gold skulls.
*There are '''7''' playable characters in Firefight, including Sergeant Johnson.
*In the side-story in the game, ''[[Sadie's Story]]'', the number of the train [[Sadie Endesha]] boards at the very beginning is 14, or '''7'''x2. 
*In the side-story in the game, ''Sadie's Story'', Dr. [[Endesha]] sees '''7''' Huragok who escaped the Covenant.
}}

==''Halo: Evolutions - Essential Tales of the Halo Universe''==
{{Main|Halo: Evolutions - Essential Tales of the Halo Universe}}
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===Midnight in the Heart of Midlothian===
{{Main|Midnight in the Heart of Midlothian}}
*[[Sergeant]] [[Michael Baird]] found fourteen terabytes of information on [[cancer]] using [[Shipnet]]. 14/2='''7'''
*[[Mo Ye]]'s initial plan was to have Baird drive the ship into a red giant fourteen million miles starboard. 14/2='''7'''
*When Baird first exited the medbay he ran into '''seven''' Covenant soldiers (4 Unggoy, 2 Kig-yar, and 1 Elite).

===The Mona Lisa===
*A Sangheili combat form was brought down "not '''seven''' meters from them."<ref>'''Halo: Evolutions - Essential Tales of the Halo Universe''', ''"The Mona Lisa"'', ''page 313''</ref>

===Palace Hotel===
{{Main|Palace Hotel (short story)}}
*John-117 fights alongside members of the [[Eridanus II]] [[E2-BAG/1/7|First Battalion, '''Seventh''' Regiment]].
*John-117 was less than '''seven''' meters from a [[Kig-yar]] when its head snapped to the side.<ref>'''Halo: Evolutions - Essential Tales of the Halo Universe''', ''page 355''</ref>

===The Impossible Life and the Possible Death of Preston J. Cole===
{{Main|The Impossible Life and the Possible Death of Preston J. Cole}} 
*[[Preston Cole]] was one of '''seven''' children (four boys and three girls). 
*Preston Cole's student ID  account was 00034. 0+0+0+3+4=7. 
*[[Ensign]] [[Alexis Indara]] begins management training (Series '''7''') following the [[CMA Season of Plenty|CMA ''Season of Plenty'']]'s bi-annual personnel review.
*Cole was called before a Board of Inquiry at the [[Academy at Mare Nubium]] on June '''7''', 2492.
*The [[UNSC Destroyer]]s which participated in the [[Callisto Incident]] in [[2494]] carried only '''7''' [[Ares Missile]]s.<ref>'''Halo: Evolutions - Essential Tales of the Halo Universe''', ''page 439''</ref>
*During the [[Skirmish at Theta Ursae Majoris]] the {{UNSCship|Gorgon}} had '''seven''' Pelicans on standby.
*"The scattered debris of '''seven''' destroyers, however, continued on their previous trajectories."<ref>'''Halo: Evolutions - Essential Tales of the Halo Universe''', ''page 464''</ref>
}}

==''Halo: Reach''==
{{Main|Halo: Reach}}
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*The [[Halo: Reach Announcement Trailer|Announcement Trailer]] was 1:17 minutes, or '''77''' seconds long.
*The [[Monument to Noble Team]] is composed of 54,439 individual points of light. (54,439=7*7777)
*At the main title screen, while various battle sounds are playing, occasionally a clear seven shot burst from an [[MA37 Individual Combat Weapon System|Assault Rifle]] can be heard.
*If a player did not purchase the Limited or Legendary editions, the player will only have access to '''seven''' Sangheili [[Armor permutations (Halo: Reach)|armor permutations]].
*There is a clearly visible '''7''' on the [[Halo: Reach Limited Edition|Limited Edition]] black box and on the [[Halo: Reach Legendary Edition|Legendary Edition]].
*The ''Halo: Reach'' limited edition Xbox 360 controller and wireless headset are both marked with the requisition number <nowiki>"//65|59_234|97///"</nowiki>. On the headset, directly before the requisition code, is a larger number 7.
*There were originally '''49''' achievements for ''Halo: Reach''. (49='''7'''<sub>2</sub>)
*The achievement "[[KEEP IT CLEAN]]" requires the player to kill '''7''' [[Moa]] in the second mission of the game's campaign.
*There are '''7''' Firefight achievements in the game.
*The [[Noble Map Pack]] includes '''7''' achievements.
*[[Jorge-052]]'s Spartan tag is a reference to the number 7. 0+5+2='''7'''
*[[Emile-A239]]'s Spartan tag is another reference to seven, 2+3+9=14, 14/2='''7'''.
*There are '''7''' [[Armor abilities]]: Sprint, [[Armor Lock]], [[Portable jump-jet|Jetpack]], Active Camouflage, Hologram, [[Drop shield]] and Evade.
*The model number of the [[M392 Designated Marksman Rifle|DMR]] is M392 (3+9+2=14 and 14/2='''7''').
*The [[H-165 Forward Observer Module|Target Locator]] calls in '''7''' missiles from orbit.
*The serial number of a [[UH-144 Falcon]] is 1611513214. (1+6+1+1+5+1+3+2+1+4=25, 2+5='''7''')
*[[Anchor 9]] is armed with '''7''' [[Point Defense Gun]]s.
*The [[MJOLNIR Powered Assault Armor/Collar#Collar/Breacher|Collar/Breacher]] chest attachment has '''7''' shotgun shells attached to it.
*There are a total of '''7''' Scarabs in gameplay, including ones in background battles. Three in the level ''[[Tip of the Spear]]'' and four in the level ''[[Long Night of Solace (level)|Long Night of Solace]]''. 
*In the mid-level cutscene of the level ''[[Winter Contingency (level)|Winter Contingency]], the assault rifle Carter kicks to [[SPARTAN-B312|Noble Six]] has '''seven''' rounds in its magazine.
*In the beginning of the mission ''[[Nightfall]]'' there is a poster in the first building with 35 black-colored people and 1 red-colored person on it. The red person is on the bottom row '''7''' places from the left. 35/5=''''7'''.
*On the level ''[[Tip of the Spear]]'', the grenade launcher starts off with''' 7''' grenades in Cooperative play.
*The player begins the level ''[[Exodus]]'', with 25 extra Magnum rounds. (2+5='''7''') In addition, there are '''7''' rounds left in the starting clip. 
*The first UNSC forces Noble Six after [[Operation: UPPER CUT]]meet in the level ''Exodus'' are members from [[Evacuation Team 7|Evacuation Team '''7'']].
*On the level ''Exodus'', the player can find an ad on the "world cuisine" store for a Moa burger combo costing '''7.77''' cR.
*In the beginning of the level ''[[The Package (level)|The Package]]'', the time is shown as 26:16.  26+16=42=6x'''7'''.  
*Pressing the hidden switch in the level "The Package" results in the tribute room door opening and '''7''' [[Sangheili General]]s emerging out of it.
*There are '''14''' engines on the back of the UNSC ''Pillar of Autumn''. 14/2='''7'''.
*At the very end of the [[Halo: Reach credits|credits]], in [[Auntie Dot]]'s grid, the number '''7''' flashes briefly before fading to the "Lone Wolf" level.
*At the end of the level ''[[Lone Wolf]]'', there are '''14''' dead Spartans, counting Noble Six. 14/2='''7'''
*Noble Six battles '''7''' Sangheili in the ending cutscene of the level ''Lone Wolf''. 
*The ending cutscene of the level "Lone Wolf" take place on July '''7'''th, 2589.  July is the '''7'''th month of the year. This is also a reference to [[Bungie Day]]. The year is also a seven reference: 2+5='''7'''; 8+9=17, 1x7='''7'''.
*There are '''7''' [[Sangheili Zealot]]s encountered in the game, the first two being in the level ''Winter Contingency'', the next one in the mining facility in ''Tip of the Spear'', a further three in the final section of the level ''[[The Pillar of Autumn (Halo: Reach level)|The Pillar of Autumn]]'', and the final one in ''Lone Wolf'' who slashes Noble Six with its [[energy dagger]].
*The ''Pillar of Autumn'' utilizes [[R7 thrust coupling|R'''7''' thrust couplings]] to lift off the surface of Reach.<ref>[[Data Drop|Data Drop Six]]</ref>
*In the multiplayer gametype [[Invasion]], when the countdown goes below '''7''', it will only recharge back up to '''7'''.
*It is a common occurrence to get '''777''' on the matchmaking post game slot machine. The Jackpot for this is '''7777'''.

===[[Dr. Halsey's personal journal]]===
*[[Elias Carver|Dr. Elias Carver]]'s initial formula for "the matrix mechanics of the socio- and politico-economic vectors of human expansion" utilized '''7''' dimensional parameters.<ref>'''[[Dr. Halsey's personal journal]]''': ''December 4th, 2510''</ref>
*Six number '''7''''s are written beside a caricature of a dead Carver.<ref>'''Dr. Halsey's personal journal''': ''December 4th, 2510''</ref>
*Halsey refers to the piezoelectric effect as a '''7'''00+-year-old technology.<ref>'''Dr. Halsey's personal journal''': ''July 30th, 2511''</ref>
*Halsey reports that standardizing UNSC operating systems over the last '''seven''' decades left them vulnerable to the insurgency.<ref>'''Dr. Halsey's personal journal''': ''October 15, 2521''</ref>
*On July 29, [[2549]] Halsey states "Only '''seven''' weeks to the completion of my personality transfer."<ref>'''Dr. Halsey's personal journal''': ''July 29th, 2549''</ref>
*Cortana was activated November '''7''', [[2549]] or 11/7/49.<ref>'''Dr. Halsey's personal journal''': ''November 7, 2549''</ref> 49='''7'''<sup>2</sup> The month and day date may also be a reference to John-117's service number.
*Miranda Keyes was decorated for her actions aboard the {{UNSCShip|Hilbert}} at the [[Battle of Gamma Pavonis VII|Battle of Gamma Pavonis-'''VII''']].
*Halsey mentioned a [[MJOLNIR Powered Assault Armor/Mark VII|'''seven'''th iteration]] of the MJOLNIR armor.
*There are a total of '''7''' blank pages at the end of Halsey's journal.
}}

==''Halo 4''==
{{Main|Halo 4}}
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*John-117's cryo chamber is designated "16". 1 + 6 = '''7'''.
}}

==''Halo Legends''==
{{Main|Halo Legends}}
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There are '''7''' different anime shorts in ''Halo Legends''.

===The Duel===
{{Main|The Duel}}
There is a '''7''' in the sky just before the battle in the desert.

===Odd One Out===
{{Main|Odd One Out}}
*'''7''' residents of planet [[Cronkee]] are spoken of in the episode, including the AI "[[Mama]]" and the dinosaur.
*The UNSC ship at the beginning of the episode is numbered "993". The average of these three numbers is '''7'''.

===The Package===
{{Main|The Package}}
*When Frederic-104, Kelly-087 and John-117 enter the ''[[Resplendent Fervor]]'', Kelly says, "We got three minutes", indicating that the space battle lasted '''7''' minutes in their 10 minutes mission time.
*The battle between John-117 and [[Thel 'Lodamee]] lasts '''7''' seconds.

===Homecoming===
{{Main|Homecoming}}
[[Ralph-303]] mentions to [[Daisy-023]] that it has been '''7''' years since they were abducted to participate in the [[SPARTAN-II]] program.
}}

==''Halo: Cryptum''==
{{Main|Halo: Cryptum}}
*'''7''' humans belonged to the crew that assisted [[Bornstellar Makes Eternal Lasting]] in inevitably finding the Cryptum of the Didact.<ref>'''Halo: Cryptum''', ''page 26''</ref>
{{Stub}}

==''Halo: Glasslands''==
{{Main|Halo: Glasslands}}
*[[Catherine Elizabeth Halsey|Dr. Halsey]] remarks her old age by reminiscing that she is no longer twenty-one years of age in ''Halo: Glasslands''. 21/3='''7'''<ref>'''Halo: Glasslands''', ''page 14''</ref>
*The completion of the [[SPARTAN-II augmentation procedures]] could not be performed until candidates were 14 years of age. 14/2='''7'''<ref>'''Halo: Glasslands''', ''page 109''</ref>
*[[New Llanelli]] was glassed '''7''' years before the [[Human-Covenant War]] ended, as remarked by [[Tom Muir]], who complains that the [[UNSC]]'s presence during the events of ''Halo: Glasslands'' were '''7''' years too late.<ref>'''Halo: Glasslands''', ''page 133''</ref>
*[[Lucy-B091]] suffered from a [[Post-traumatic vocal disarticulation|speech impediment]] of a '''7''' year duration.{{citation needed}}

==''Halo: Combat Evolved Anniversary''==
{{Main|Halo: Combat Evolved Anniversary}}
*All the references from the original game apply here.
*The player has to escape the [[Flood containment facility]] within 21 minutes to get the [[Breaking Quarantine (achievement)|Breaking Quarantine]] achievement.
*The [[Anniversary Map Pack]] released with the game is made up of '''7''' maps.
*The '''Anniversary Map Pack''' includes '''7''' achievements.
*The ''[[Halo: Combat Evolved Anniversary]]'' manual has '''7''' pages excluding the front and back covers.

==''Halo: Primordium''==
{{Main|Halo: Primordium}}
*As Chakas and [[Vinnevra]] visit a crashed Forerunner escape pod, Chakas counts the partial remains of about '''7''' dead Forerunners.<ref>'''Halo: Primordium''', ''page 50''</ref>
*The Forerunner [[Lifeworker]] [[Genemender Folder of Fortune]] is said to have '''7'''-fingered hands.<ref>'''Halo: Primordium''', ''page 166''</ref>
*The victorious Forerunner assault on the [[Prehistoric human civilization|humans]] at [[Charum Hakkor]] were staged of '''7''' [[slipspace portal]]s.<ref name="pri240">'''Halo: Primordium''', ''page 240''</ref>
*'''7'''000 human warriors and '''7'''0 human vessels were assigned to protect the [[Time bolt|timelock]] that contained [[the Timeless One]].<ref name="pri240"/>
*The flashbacks of a recovered fragment of [[343 Guilty Spark]], formerly known as [[Chakas]], primarily take place on [[Installation 07]], one of the '''7''' Halo rings.<ref>'''Halo: Primordium''', ''page 374''</ref>

==Miscellaneous==
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*Most of the ''Halo'' series is set in years beginning with the number 25. 2+5='''7'''  The vast majority of the game trilogy is set in 2552. 5 and 2 is the exact same equation, per order of operations.
*In the Halo series there are '''7''' levels named after a Halo character: 343 Guilty Spark, Keyes, The Arbiter, Regret, Gravemind, Sierra 117 and Cortana.
*There are '''seven''' remaining Spartan-IIs still active: John, Fred, Kelly, Linda, and the 3 members of [[Gray Team]].
*Smart AIs (such as [[Cortana]]) go [[rampant]] after '''seven''' years of activation.
*Most family names of Sangheili have '''7''' letters, including the 'ee' suffix for military service (e.g., Vadumee, Zamamee, Vadamee).
*Many Covenant weapons have Type-52 or Type-25 at the beginning of their official names (5+2='''7''' and 2+5='''7''')
*The Human-Covenant War lasted a total of 28 years. 28 is divisible by '''7''', 28/4='''7'''.
*All known "[[Monitor]]" [[Forerunner]] A.I.'s have I.D. numbers that are powers of '''seven'''.
*There are '''7''' active Halo rings.
*The [[cryonics|cryonic]] put-down cycle takes '''seven''' minutes.<ref name="encyc1">'''[[Halo Encyclopedia]]''', ''page 216''</ref>
*The ASCII [[John-117|Master Chief]] in a [http://www.bungie.net/News/content.aspx?type=topnews&cid=8302 Bungie Weekly Update] was made with '''7'''s.
*In the preview of ''Halo 3'' featured at the Seattle IMAX theater, Bungie gave away a prize to the person sitting in seat G'''7''' (G is the '''7'''th alphabet).
*In the [[Cortana Letters]] "... In my palace deep, Lyca lies asleep ..." is mentioned on the '''7'''th letter and is believed to be from the poem "The Little Girl Found-By William Blake". One section reads:

:"Arm in arm, '''seven''' days<br>
:They traced the desert ways.<br>
:'''seven''' nights they sleep<br>
:Among shadows deep,<br>
:And dream they see their child<br>
:Starved in desert wild."
}}

==Sources==
{{reflist|3}}

==Related links==
===Internal===
*[[List of references to religion in the Halo series]]
*[[List of Marathon References in Halo]]

===External===
*[[Wikipedia:7|"7" on Wikipedia, the free encyclopedia]]
*[http://www.bungie.net/Forums/posts.aspx?postID=29971515&viewreplies=true '''Bungie.net''': ''The Bungie Code: Septionary: Every 7 Letter Word In The English L...'']
*[[w:c:Unhalo:List of "Three" References in Halo|'''Gruntipedia''': ''List of "Three" References in Halo'']] - Parody of this list at Gruntipedia.

[[Category:Lists|7]]