Editing Floodgate (Level)

{{Ratings}}{{Era|H3}}
{{Level infobox 
|prev=''[[The Storm (Level)|The Storm]]''
|next=''[[The Ark (Level)|The Ark]]''
|game=''[[Halo 3]]''
|image=[[Image:H3_Floodgate_Preview.jpg|300px]]
|name='''''Floodgate'''''
|player=[[SPARTAN-117]]
|date= [[2552]]
|place= [[Voi]], [[Earth]]
|Objective=*Stop the [[The Flood|Infestation]]
*Find [[Cortana]]
|enemies=
*Flood [[Combat Form|Human Form]]s
*Flood [[Combat Form|Brute Form]]s
*Flood [[Elite Form]]s
*[[Stalker Form]]s
*[[Flood Ranged Form]]s
*[[Flood Tank Form]]s
*[[Flood Carrier Form]]s
*[[Flood Infection Form]]s
}}
{{Article Quote|Stop the [[The Flood|Infestation]].  Find [[Cortana]].}}
'''Floodgate''' is the fifth and shortest [[campaign]] mission of ''[[Halo 3]]''.

== Background ==

It takes place in [[Voi]], [[Kenya]] on the continent of [[Africa]] on [[Earth]] during the [[Second Battle of Earth]] and the [[Battle of Voi]]. Floodgate is also the first campaign mission where the [[Flood]] are encountered in Halo 3.

Shortly after disabling the Anti-Air Gun in [[The Storm (Level)|The Storm]], [[UNSC Frigate]]s under the command of [[Lord Hood]] attack the Covenant controlled [[Forerunner]] [[Dreadnought]]. This attempt failed, and it appeared the Dreadnought survived unscathed. The Covenant Loyalists activated the Portal to the [[Ark]], temporarily disabling the UNSC's nearby ships. The rest of the Covenant Loyalist fleet follows the Dreadnought into the portal. With the [[UNSC]] fleet disabled, and the Anti-Air gun out of commission; a Flood-controlled Covenant [[CCS-class Battle cruiser]] comes out of slip space nearby and crashes into [[Traxus Factory Complex 09]].<ref>''[[Halo 3]]'', level ''[[The Storm (Level)|The Storm]]''</ref> 

In order to eliminate the infestation, [[John-117]] and the [[Arbiter (Character)|Arbiter]] must overload the crashed cruiser's engines, wiping out the entire city and the Flood with it. To do this, they push back through the factory where they just came from, fighting many Flood [[Combat Forms]], including a new Flood species, [[Pure Form]]s. They are then aided by the arrival of [[Rtas 'Vadum]] and the [[Covenant Separatist | Covenant Separatist]] fleet. The Arbiter and Chief, along with some elites, push forward to the crashed ship, and the Arbiter holds position while the Chief extracts what is believed to be [[Cortana]], stored in a [[Covenant Storage Device]]. This eventually turns out to be only a recording. 

Once on the [[Covenant]] ship, [[Shadow of Intent]], [[343 Guilty Spark]] extracts [[Cortana]]'s recorded message from the [[Covenant Storage Device]]. [[UNSC]] and [[Covenant Separatists | Covenant Separatists]] begin to prepare for the voyage to [[The Ark]]. And while doing so, [[Covenant]] warships begin to glass Voi and the immediate vicinity to prevent further contamination by the Flood.

Upon completing it on the [[Normal]], [[Heroic]], or [[Legendary]] difficulties, the player will earn the [[Cleansing (Achievement)|"Cleansing" achievement]] and 30 [[Gamer points]].

== Transcript ==
Note: In [[co-op]] game play, the Arbiter does not speak, and real time conversations including him do not play.

=== It Followed Me Home ===
'''''Hot zone. Weapons free.'''''

'''{''Gameplay''}'''

*'''[[Miranda Keyes|Commander Keyes]] (COM)''': "The [[Flood]]. It's spreading all over the [[Voi|city]]."

*'''[[Lord Hood]] (COM)''': "How do we contain it?"

*'''Commander Keyes (COM)''': "Find the [[CCS-class Battle cruiser|crashed Flood ship]], overload its engine core. We either destroy this city, or risk losing the entire planet."

*'''Lord Hood (COM)''': "Do it."

*'''Commander Keyes (COM)''': "[[Master Chief|Chief]], make your way to the crash site."

''Sometime later, when the Chief and the Arbiter re-enters the city.''

*'''[[Arbiter (Character)|Arbiter]]''': (May vary upon difficulty setting) "There are some powerful weapons we've not yet used..."

*'''[[Marine]] Commander (COM)''': "All squads, report!"

*'''Marine [[Sergeant]] (COM)''': "Multiple contacts, unknown hostiles."

*'''Marine (COM)''': "There! Over there! We're surrounded, Sergeant!"

''A couple of [[Marines]] are seen through a wire fence fighting off two [[Flood]] [[Combat forms]]. They retreat behind the building, the Flood follows.''

*'''Marine (COM)''': "Aaaaah!"

''You find a group of Marines in a loading ramp.''

*'''Marine Sergeant (COM)''': "Fall back, fall back!"

*'''Female Marine''': "Sergeant, come on!"

''[[Infection Forms]] and [[Combat Forms]] (Including the Brute ones) descend and swarm on the Marines at the ramp, infecting and killing them, forcing the other Marines, the Chief, and Arbiter to kill them.''

*'''Female [[Marine]]''': "What are you doing?!"

*'''Marine''': "That's not the Sergeant. Not anymore."

''They fight off the current wave of Flood.''

*'''Arbiter''': "Quickly! Let us find their ship. Make short work of this abomination!"

''The Marines accompany the Chief and Arbiter into a building, where a lone Marine fights off a horde of infection forms.'' {It is possible to save him, but more often than not, he will be mutated before your eyes}

*'''Infected [[Marine]]''': "Uhh! Get off me!"

''If the Marine is not saved, the Infection Form dives into the Marines chest, causing his back to swell and his skin to change color. He collapses to the floor then Whip Tentacles grow out of his left arm and then the sensors on the Infection Form pop out of his chest wound, forcing the Chief and the Arbiter to immediately kill him.''

''Marines are pinned down behind sandbags with lots of Flood surrounding the area. The Chief and Arbiter clear the section of the warehouse.''

''If the Marines are saved from being killed or infected.''

*'''Female Marine ''': "It gets inside you, chews you up."

*'''Marine''': "We gotta get outta here."

''Reaching the other end of the warehouses, the surviving Marines who joined the Chief and Arbiter hold position after clearing the area.''

*'''Arbiter''': "Wretched parasite! Rise up and I will kill you! Again and again!"

''Upstairs, a couple of Marines, one wielding the [[Flamethrower]], tries to combat the Flood as well, but they soon die, leaving the flamethrower for the Chief or Arbiter to pick up as they head up there and down a hole in the floor into the office areas.''

*'''[[Cortana]] (Cortana Moment)''': "Chief. ''{background mumbling}'' I can't tell you everything...it's not safe. The [[Gravemind]]...it knows I'm in the sys... ''{Background mumbling}''."

''The Chief and Arbiter force their way through another wave of Flood, and find a marine huddling in a corner of the large room used for the Aid Station in [[the Storm]] on Voi, with a pistol surrounded by three dead marines.''

*'''Traumatized Marine''': "I didn't have a choice. (pause) The LT, the Sergeant, they were all infected! (Pause) I could see it crawling, sliming beneath their skins!! (sobs) (pause) And... and then they got up... s-started to talk! OH GOD! Their voices! Oh, God! No, make them stop! (Pause) I did them a favor. Y-yeah that's it; I helped them (Sobs). (Pause) Maybe... maybe I need to help myself (babbling and weeping)." (As the Chief walks out there is the sound of a pistol shot)

''With no time to spare, the Chief and Arbiter continue on ahead to the lake bed.''

===Shadow of Intent===
''''The Flood. It has Evolved.''''

''The Master Chief and Arbiter enter the lake bed of Voi where the [[Scarab]] was previously fought and destroyed, and three [[Elite]]-controlled [[CCS-class Battlecruiser|''CCS''-class Battlecruiser]]s fly in formation as an [[Assault Carrier]] slices overhead from [[Slipspace]], scattering [[Orbital Insertion Pod]]s.''

{''Cutscene''}

'''[[Ship Master Rtas 'Vadum]] (COM)''': "Hail [[Human]]s, and take heed." 

'''Ship Master Rtas 'Vadum (COM)''': "This is the carrier ''[[Shadow of Intent]]''. Clear this sector while we deal with the Flood."

''[[Major Elite|Major]] and [[Special Operations Elite|Special Operations]] [[Elite]] ranks leap out of the landed [[Orbital Insertion Pods]] ahead of the Chief and the Arbiter, fighting against the Flood.''

{''Gameplay''}

*'''Arbiter''': "My brothers, I fear you bring bad news."

*'''[[Major Domo Elite]]''': "''[[High Charity]]'' has fallen, become a dreaded hive!

*'''Arbiter''': "What of the fleet? Has quarantine been broken?"

*'''Major Domo Elite''': "A single ship broke through our line, and we gave chase."

*'''Arbiter''': "We had a fleet of hundreds!"

*'''Major Domo Elite''': "Alas brother...the Flood. It [[Pure Form|has evolved]]!"

''The Chief, Arbiter, and Elites fight their way through the infestation and arrive at the crash site.''

*'''Commander Keyes (COM)''': "Chief, the Elites are looking for something. We didn't believe them when they told us."

*'''Johnson (COM)''': "It's [[Cortana]], Chief! She's on that ship! Find her! Get her out!"

''Once outside again, a couple of Separatists Phantoms arrive, dropping off more Elite reinforcements to combat the Flood.''

*'''Major Domo Elite''': "Hurry, Demon! We seek the same prize. But our Shipmaster will sacrifice ''all'' to stop the Flood."

''The Master Chief, the Arbiter, and the remaining Elites fight past dozens of Pure Forms, Combat Forms, and Infection Forms to the massive, burning hulk of the crashed Flood battle cruiser. Up an incline, an ominous hole resides in the ship's hull, leading to the interior.''

*'''Arbiter''': "We'll hold here. I will let nothing pass."

''Master Chief drops in alone.''

=== Infinite Devil Machine ===

*'''[[Gravemind]] (Gravemind moment)''': "Do not be afraid. I am peace...I am salvation."

[[Image:Flood wall.jpg|thumb|right|The Flood biomass-covered walls of the crashed Flood-controlled Battlecruiser.]]

''The Chief reaches into a large room.''

*'''Gravemind (Gravemind moment)''': "I am a timeless chorus; join your voice with mine and sing victory everlasting!"

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{{Clear}}

'''{''Cutscene''}'''

''Inside the central chamber of the Flood-infested crashed [[CCS-class Battlecruiser|cruiser]]. The Chief finds 'Cortana' in a small Covenant hand held memory unit.''

*'''[[Cortana]]''': "Chief!"

*'''Master Chief''': "Cortana?"

*'''Cortana''': "''High Charity'', the [[Prophet]]s' holy city, it's on its way..."

''Cortana's projection above the holographic unit flickers and then disappears.'' 

*'''Master Chief''': "Cortana!"

''Suddenly, the humming of a [[Phantom]]'s gravitic drives are heard, and a Phantom appears over the open chamber. The Chief turns and readies his [[MA5C ICWS Assault Rifle]] at it while [[343 Guilty Spark]] floats down from the Phantom, which continues to hover overhead.''

*'''[[343 Guilty Spark]]''': "[[Reclaimer]]!"

''A Flood Combat Form appears to the right, and 343 Guilty Spark turns and uses a powerful energy beam on it, destroying it in a single glancing hit. 343 Guilty Spark turns back to the Covenant device where Cortana supposedly is, and begins to interface it with a beam projected from his central eye.''

*'''343 Guilty Spark''': "We must act quickly before your construct suffers any further trauma!"

''The Chief menacingly grabs 343 Guilty Spark and pulls him away from Cortana's storage unit.''

*'''Master Chief''': "Wait. Leave. Her. Alone."

*'''343 Guilty Spark''': "If we do not take this device to a safe location, somewhere I can make repairs..."

''343 Guilty Spark continues to try to project his multicolored energy beam into Cortana's storage unit.''

*'''Master Chief''': "On [[Installation 04|Halo]], you tried to kill Cortana. You tried to kill ''me''".

*'''343 Guilty Spark''': "Protocol dictated my response! ''She'' had the [[Index|Activation Index]] and ''you'' were going to destroy ''my'' installation. You ''did'' destroy my installation. Now, I only have one function: to ''help'' you, Reclaimer, as I always should have done."

''Master Chief stares wordlessly at 343 Guilty Spark, then slightly motions with Cortana's storage device. 343 Guilty Spark takes Cortana's device away, shooting his beam into it, while the Phantom projects a [[Gravity Lift]]. 343 Guilty Spark enters it first and MC reluctantly follows.''

''The view cuts to an aerial one over the whole town of [[Voi]] at a high altitude. Clouds completely obscure the surface of [[Earth]], but part of the crashed Flood-controlled battle cruiser is visible in the distance. The Phantom flies away from the surface while two CCS-class Battle cruisers of the [[Sangheilian Fleet]] "[[Glass]]" the town of Voi with plasma beams.''

''The view then cuts to an aerial one above the [[Forerunner]] [[Portal]]. Its 'wings' are open and blue energy streams from their tips to the open Slip space portal drifting ominously above the construct. The scene is quiet, and the moon is in the background. Fighting on Earth has ceased, and the [[Second Battle of Earth]] has ended with the departure of the [[Prophet of Truth]]'s fleet through the Portal hours earlier. Four vessels of the Sangheilian Fleet are gathered above the Portal, and 343 Guilty Spark's Phantom arches to the largest of them: the assault carrier Shadow of Intent.''

''Inside the bridge of the Elite-controlled command vessel, the Assault Carrier Shadow of Intent. Elites and humans are gathered around a long holographic table, with [[Ship Master]] Rtas 'Vadum floating on a gravity throne at one end with his Elite attendants, Master Chief and the Arbiter in the middle, and [[Fleet Admiral]] Hood and Commander Miranda Keyes at the far side of the table. All are silent except 343 Guilty Spark, who is bobbing at the center of the table and interfacing with Cortana's memory unit with his projector beam.''

*'''Rtas 'Vadum''': "Will [[Cortana|it]] live, [[Oracle]]? Can it be saved?"

*'''343 Guilty Spark''': "Uncertain. This storage device has suffered considerable trauma. Its matrices are highly unstable."

''343 Guilty Spark glances at 'Vadum and Lord Hood''

*'''Lord Hood''': 'Perhaps one of ''our'' technicians-"

*'''Rtas 'Vadum''': "That will ''not'' be necessary."

''Coincidentally, the storage device works again, and a holographic projection of Cortana springs up.''

*'''Cortana''': "Chief!"

*'''343 Guilty Spark''': "Success!" 

*'''Cortana''': "High Charity...the Prophets' holy city, is on its way to Earth, with an army of ''Flood''. I can't tell you everything. It's not safe. The [[Gravemind]]...it knows I'm in the system."

''Cortana's image flickers, and the Chief turns to the Arbiter and the Elites.''

*'''Master Chief''': "It's just a message."

*'''Ship Master Rtas 'Vadum''': "Let it play."

''343 Guilty Spark jolts the device with another beam.''

*'''Cortana''': "But it doesn't know about the Portal, where it leads. On the other side, there's a solution; a way to ''stop'' the Flood, without firing the remaining [[The Halos|Halo rings]]. "

''Suddenly, Cortana's skin lights with lightning and she gasps in sudden pain and collapses onto the 'floor'."

*'''Cortana''': "Hurry, Chief! The [[Ark]]...there isn't much time."

''Cortana's recording ends and pauses.''

*'''343 Guilty Spark''': "I'm sorry..."

*'''Rtas 'Vadum'''(Leaning back in his seat): "No matter, Oracle. We've heard enough. Our fight is through the Portal, with the Brutes and the bastard Truth!"

''Special Operations Elites around the room raise their forearms and roar in agreement.''

*'''Lord Hood'''(Exhausted): "Fine. We'll remain [[Earth|here]]...hold out as long as we can."

*'''Ship Master Rtas 'Vadum''': "Did you not hear? Your world is doomed."(Descends from his seat) "A Flood army, a Gravemind, has you in its sights! You barely survived a small contamination."

*'''Lord Hood''': "And ''you'', Ship Master, just glassed half a continent! Maybe the Flood isn't all I should be worried about."

*'''Ship Master Rtas 'Vadum''': "One single Flood spore can destroy a species. Were it not for the Arbiter's counsel, I would have glassed your entire ''planet''!"

''Lord Hood angrily motions at 'Vadum, but Miranda Keyes places a hand on his shoulder.''

*'''Commander Keyes''': "Sir, with respect, Cortana has a solution."

*'''Lord Hood''': "Cortana? Did you see her condition? How damaged she is?"

''While Hood and Keyes argue, the Master Chief bends down and observes Cortana's pained collapsed paused figure.''

*'''Lord Hood''': "She could be [[Rampancy|corrupted]] for all we know. Her "solution" could be a Flood trap."

*'''Commander Keyes''': "We should go through the Portal, find out for sure."

*'''Lord Hood''': "What we ''should'' do Commander, is understand - <u>clearly</u> - that this is humanity's final stand - <u>here</u> - at Earth. We go, we risk ''everything''; every last man, woman, and child. If we stand our ground, we might just have a chance."

*'''Arbiter''': "No! If your construct is wrong, then the Flood has already won." 

*'''Master Chief''': "I'll find Cortana's solution. And I'll bring it back."

*'''Lord Hood''': "Earth...is all we have left. You trust Cortana that much?"

*'''Master Chief''': "Sir. ''Yes'' sir!"

*'''Lord Hood''': "This is either the best decision you've ever made or the worst. Hell, if it is, Chief. I doubt I'll live long enough to find out which."

''Lord Hood turns, looks wordlessly at Miranda Keyes, and then exits the bridge.''

''Inside the Shadow of Intent's hangar bay, both the Elites and the UNSC are readying for battle; the battle through the Portal. While a Separatist Phantom drifts into the hangar on the far side, two [[M12 Warthog LRV]]s race to the loading elevator, drawing near a group of Marines clustered around some UNSC crates. At uneasy rest opposing the Marines are a Major Elite and a few [[Minor Elite]]s. The Major Elite's [[Particle Beam Rifle]] is resting on the floor. Sergeant Major Johnson, with his arm full with 'stolen' [[Covenant Carbine]]s brushes past the wordless Elites, scooping to pick up the Major Elite's rifle. The Elites rise in anger around Johnson.''

''Nearby, a pair of [[Orbital Drop Shock Trooper]]s are joking with each other as the Arbiter passes by, with an acquired [[M41 Rocket Launcher]] on his shoulder and a [[M7057 Defoliant Projector]] in his hand. The ODSTs and a pair of nearby Marines observe the Arbiter in half-awe, half-disappointment over the loss of their Rocket Launcher, when 343 Guilty Spark drifts through the Marines in tow behind the Arbiter, leaving a Marine speechless. Johnson re-joins the Marines, beginning to hand out Carbines, the scene cuts to the fore of the hangar, where a [[Pelican Drop ship]] lays before the hangar's energy field.''
[[Image:Hood Pelican.jpg|thumb|right|Lord Hood grimly watches Miranda Keyes and Spartan-117 as his [[Pelican]] departs from the hangar.]]
''The Chief and Miranda Keyes stand at attention before Lord Hood, who looks at them grimly from the rear of the Pelican as the troop bay door shuts and the Pelican takes off. Keyes glances at the Chief wordlessly, and the two leave, going off to their own businesses.''

''Hood's Pelican arcs away from the gathered [[Sangheilian Fleet]] as the Shadow of Intent powers its engines and thrusts into the Portal, followed by eight Cruisers, a Carrier, the UNSC Frigates [[Forward Unto Dawn]] and [[Aegis Fate]].''

== Walk Through ==

=== Normal Difficulty Walk Through ===

At the beginning just backtrack your footsteps to where you fought the Hunters on the previous level. Note: As you are walking back you can check between a truck and a crate to find a dead Brute Chieftain, with a 100% charge Gravity Hammer next to him. Along the way sub your BR for a Shotgun. Position yourself behind the sandbags with your Shotgun out. Make sure to throw 2 Fragmentation Grenades down the ramp when the Flood shows up. If you look at the top of the building to the right with your scope right before you enter the city you will see a flood combat form come up to the edge and jump to the building on your left, if you shoot him right before he jumps he will throw a [[skull]] and it will land on the ground. Just mow down the Brute Combat Forms first then the Human Combat Forms. If the two Marines behind the sandbags are alive, good job. Go into the building and get your Assault Rifle out and you'll see a Marine run from a horde of Infection Forms. Shoot the one at the ground first then shoot the ones on him. Shoot a full reticule length away from him that way you don't shoot him. 

When that's said and done, hop down with your Shotgun and mow down any Flood coming near the [[Marines]]. The [[Infection Form]]s aren't much a threat if there isn't something to distract you. Head across the factory saving any Marines you can and killing ALL the Flood. When you see an area that looks clear, think again. Get out your Shotgun. It's probably low on ammo by now, so take out whatever Flood you can then switch back to the Assault Rifle. When everything is dead, switch your Shotgun for a Battle Rifle and pick the Flamethrower from the corpses. If any marines survived they tend to get stuck and do not proceed to the next area, if you wish for them to keep fighting with you may need to give them a bit of a push and eventually they will start moving under their own steam (bear in mind it appears you can only take 5 marines to the next section). 

Proceed through the only you can go and you'll be in a room of twists and bends. Make sure you aim the Flamethrower high or you'll shoot the ground and probably burn yourself. When they're all dead proceed to a room with a scared Marine. It kind of reminds you of the [[Crazed Marine|one]] from the first game doesn't it? He won't do anything but say things of how his squad died. If you want whack him or just leave. You'll be outside and you'll get a cut scene of the Shadow of Intent dropping a few [[Elite]]s. Help them out if you can, but they'll probably get killed then infected by the Flood. It is possible to kill the majority of the flood combat forms with a BR before triggering the cut scene if you stand on the catwalk to the left immediately out of the door that leads to the wide open area ensuring that the Elites have no immediate threats. Clean house with whatever you have left of the Flamethrower, and if you're lucky, you can find a Shotgun. Replace the Battle Rifle for it and proceed. When you see a ramp, I suggest you hang back a bit. Just literally run forward a bit and then run backwards so the Flood that jump out of the crater won't be on your 12 and 6. Wait until they get close so you can one-shot them with your Shotgun or melee to conserve ammo. 

When all of the Flood are dead, go up the ramp and into the factory and if you have a Deployable Cover, drop it. It's a long hallway and if you just sit behind it, the ones with the guns are no threat. Stick a Combat Form in a group with a Plasma Grenade, and you should disperse most of them. When they're dealt with proceed forward to the spot where you found the .50 cal gunner on the last level. Get to the upper level and, with your shotgun, gun them all done. If one of them has a Needler, take it out quickly. They surprisingly have good aim. When you go outside, you'll run into a new Flood form, known as the [[Pure Form]]. In it's first stage, the Stalker form, it can do nothing but run around, so it'll evolve into a ranged form, or a tank Form if you give it the time. Throw a frag grenade then one Shotgun should do it good. After that, the Elites finally show up to help. These are Assault Elites. Anyway, quickly get on the turret and mow down any Flood you can. Pick it up and shoot down any ranged forms or tank forms you can find. When it runs out of ammo let the Elites take care of the rest. Eventually you should be able to see 2 ranged forms bombarding you, obviously you should take them out. Maybe throw a grenade or just run in like stupid, 2-3 well places shots will take 'em down. When the crashed ship comes into view, just run to it, don't worry about the Elites or the Arbiter, they won't come anyway. When you're inside, '''DON'T SHOOT THOSE SPORE PODS'''! They spawn approximately 25-30 infection forms per sack. As long as you don't shoot them, you won't face any opposition inside. Just pick up Cortana and watch the cutscene.

=== Suicidal Marine ===

Shortly after you get the [[Flamethrower]], there will be a Marine in the corner talking to himself about his squad's infection by the [[Flood]], and how he just "did them a favor." After this, he says something about how he should do himself a favor too, and points his gun at his head, seemingly about to kill himself, although he alternates between this and putting his gun down and shaking. It should also be note that he sometimes will not have his gun out, and instead be pointing his empty hand at his head.

== Trivia ==
*When you encounter the Marines in the loading ramp area in the beginning of the level, it is in fact possible to save all of them except one, who is scripted to mutate into a [[Flood Combat Form]]. However, this is extremely difficult, and fairly impossible on higher difficulties.

*Inside the factory, there are five Marines total, all of whom can be saved. Of these five, however, the first one is being blitzed by an out sized number of [[Infection Form]]s, almost impossible to save, the next two are defending some sandbag fortifications from a huge number of combat forms, and the last two, including a shotgun-wielding Reynolds, are under attack from an equally large number of combat forms out in the open. Needless to say, it is extremely difficult to save them all, let alone a few.

*It is possible to save the first marine you encounter upon entering the facility. One way is to throw a frag grenade right behind the marine (you must be fast). Almost every time you do this, the grenade will kill most of the infection forms and any on the marine himself, leaving you to kill anymore infection forms left. However, turning on the [[Halo 3 Skulls|Cowbell Skull]] would cause more serious damage to the marine and result in his death.

*At the start of the level just past the area with the [[Surface-to-Air Missile Launcher|SAM (Surface-to-Air-Missile)]] you can see what appears to be an image of a demon's head, if you look right when you should turn left, on some [[Covenant]] wreckage.

*There is a glitch where the suicidal Marine does not hold his pistol but still does the motion.

*If you save the Marine that is being chased by the Flood (most likly with a [[Shotgun]]) even if you shoot him by accident he will whine about friendly fire even though you saved his life.

*Oddly, even though [[Commander Keyes]] tells you to do so, you never overload the cruiser's engine core, instead letting the Elites glass the area.

*The suicidal Marine bears a striking resemblance to the [[Crazed Marine]] in [[Halo: Combat Evolved]] that shoots you. It should be noted that the player comes across the crazed marine in the first level you fight the Flood and that you come across the suicidal marine in the first level you fight the Flood in Halo 3.

*In the last section of the level, upon entering the infected ship, on the floor after falling down the hole in the ship you will see several elite bodies.  some of these seem to have helmets that resemble the commando helmets, but if you look closely you will see that they in fact have combat helmets, with assault helmets fused into the front.  This is either a glitch or somehow-but seemingly unlikely- meant to be. The only exception is the body identical to Rtas Vadum's.  The Body and Shoulder armor of these elites is assault armor.

*At the very beginning, where it says "It followed me home", walk forward until you see the large crack separating the land. If you zoom in, you will see 2 marines, one with an SMG and one with a Pistol running. They will be followed by 4 Flood [[Combat Forms]]. If the marines survive this wave, 6 more will come. Its fun to see how marines fare against the Flood. Amazingly, in some cases they will survive this attack. If they do, they will run back the way they came. But if they lose, the surviving flood will either stay where they stand, or they will run back to where they came from. You can help them with grenades and your Battle Rifle but they will most likely die when they get ambushed by Flood up ahead.

*It is possible to let the Marines whom you saved in the first half (if any) follow you for the rest of the level. (NOTE: Only tried this in Single-Player.) Just walk halfway through the catwalk (Where the dead flamethrower-wielding Marine is. It leads to the room of the first Cortana transmission.) so that the AI makes the Arbiter follow suit. Then, push a Marine to the first few steps of the stairs. If done correctly, the Marine will walk all the way across the catwalk just like the Arbiter. Do this to the other Marine/s (optional). You then have to proceed by going THROUGH THE HOLE. Don't jump through or break any of the windows! Or the AI will make some, if not most, of them attempt to run directly through the windows, and since the windows have small ledges, they won't be able to get out. (Why the AI doesn't just make the Marines jump is unknown.) So jump through the hole and push your Marines through the doorway the Arbiter passed through. (NOTE: This is the room UNDER the hole, the one with Medical crates.) If done correctly, the Marines should move through the other room to get to the large room with the 2 Field Armories, and follow you for the rest of the level, even fighting the Flood alongside the Elite reinforcements. 

*This level and the level [[343 Guilty Spark]] are the only levels in the Halo series where Marines aid you if fighting against the Flood. (Though the level "Covenant" does feature some combat sequences where the Marines or ODSTs assist you in combating the Flood)

*When Lord Hood accuses the Ship Master of glassing half the continent of Africa, he is hyperbolizing in order to emphasize his disgust in the actions taken it glassing the area. In fact, the glassing of half the continent is impossible, for Mount Kilimanjaro can be seen unscathed in the post game credits; also, the memorial cinematic is set in Kenya which would coincidently lie within the "half the continent" supposedly glassed.

*During the part where the 2 Phantoms drop off Elite reinforcements to assist, the Elites that are dropped from the second Phantom (the one further up ahead, nearer to the crashed cruiser) can be saved if you reach there in time, otherwise they will die fighting the Flood, near a Gravity Hammer equipped-Brute corpse.

*If you melee the [[Suicidal Marine]],(depending whether if he survives) he will stop crying and may follow you through the rest of the level.

*On rare occasions, when you reach the [[Suicidal Marine]], he will be wearing a different uniform. Example: Standard marine uniform or specialist uniform.

*While in the [[Covenant]] Cruiser: If you melee the dead bodies of the [[Elites]] down to the first biomass room and shoot a sac to infect them after they are infected one of the flood elites bodies cannot be destroyed when up and moving, but can when not infected or fighting. It is possibly the body identical to [[Half-Jaw]]. This is also a strange but wonderful way to get points in the Meta-game because it can be infected unlimited times. 

*The level shares a similarity with the Halo:CE level; [[Two Betrayals (Level)|Two Betrayals]] because it is also another level on the same terrain, etc, but just going backwards.

*It is possible to get through the final area to the ship without fighting.

*At the ending of the level where you see the silver Elite corpses, if you knock them down the hole, they can become infected and create new Ultra [[Combat Forms]].

*This is the first level where you get Elite Allies in Halo 3.

*There are 3 known ways to "get outside" the map in this level
*The level is much more eerie and different. Buildings are now on fire and weapons and bodies not there before are now there.
*At the first checkpoint, you will hear marines communicating over the radio.  One of them says, "we're surrounded sergeant."  This is the same quote Captain Keyes said in Halo: Combat Evolved during the Jenkins cut scene.

== Images ==
<Gallery>
Image:Floodgate1.jpg|The Shadow Of Intent leaves Earth via The Portal
Image:Floodgate2.jpg|Lord Hood's dropship leaves The Shadow Of Intent
</Gallery>



{{succession box | before = ''[[The Storm (Level)|The Storm]]'' <br />| title = [[Halo 3 Campaign|''Halo 3'' Campaign Missions]] | years = '''''Floodgate''''' |after = ''[[The Ark (Level)|The Ark]]''}}

{{Level}}

[[Category:Halo 3 Campaign Missions]]