Editing The Library

{{Status|Gameplay}}
{{disambig header|the campaign level|other uses|Library (disambiguation)}}
{{Level infobox
|pagegamelabel=CE
|prev=''[[343 Guilty Spark (level)|343 Guilty Spark]]''
|next=''[[Two Betrayals]]''
|name='''''The Library'''''
|image=[[File:HCEA TheLibrary Loadscreen.png|300px]]
|game=''[[Halo: Combat Evolved]]'' {{C|''[[Halo: Combat Evolved Anniversary|Anniversary]]''}}
|devname=<code>c20</code>{{Ref/File|Id=HCEEK|HCEEK|HCEEK\tags\levels\c20\c20.scenario}}
|player=[[Master_Chief_(gameplay)#Halo:_Combat_Evolved|Master Chief]]
|date=[[2552#September 21, 2552|September 21, 2552]]
|place=Inside the [[Library]] of [[Installation 04]]
|objective=Retrieve the Index.
|partime=00:25:00 {{C|''Master Chief Collection''-only}}
|parscore=25,000 {{C|''Master Chief Collection''-only}}
}}
{{Article quote|Fight your way through an ancient security facility in search of the [[Activation Index|Index]].}}

'''The Library''' is the seventh [[campaign]] level in ''[[Halo: Combat Evolved]]''. It begins after [[343 Guilty Spark]] teleports [[John-117]] from the swamp he was in to the [[Library]] of [[Installation 04]]. The Master Chief must battle through four [[Flood]]-filled levels to reach the [[Activation Index|Index]] chamber.

==Transcript==
===The Library===
[http://www.youtube.com/watch?v=zmX8CBX3D_I '''{''Original Cutscene''}''']
[http://www.youtube.com/watch?v=cmxV9_CHNxk '''{Anniversary ''Cutscene''}''']

[[File:LibraryArrivalCEA.jpg|thumb|300px|John-117 and 343 Guilty Spark teleport into the Library.]]

''The view flies through the main central chamber of the Installation, through a rotating doorway, to find 343 Guilty Spark and the Master Chief teleporting in.''

*'''343 Guilty Spark''': "We must collect the Index before we can activate the installation."

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

''Over the course of the level, 343 Guilty Spark mutters various phrases, which include'':

*"Doodeedooodooo..."
*"Teeheeeheeeheeehee!"
*"Huaaaaa, huaaaauuuuhummmmm."
*"Ahhhh...I, am a genius. Heeheeheehee!"
*"Hum hum huuuuum, hum hum hum."
*"Ah."
*"Oh. Hello."
*"Hahahahaha!"
*"Oh. That's a good idea."

''If the Chief dies:''
*"[[Reclaimer]], we must keep moving...! Reclaimer?"
*"Oh, how unfortunate."
*"Ah, a pity."
*"I told you to upgrade to at least a class 12 [[Combat Skin]]!" 

''If the Chief attacks 343 Guilty Spark or the Sentinels:''
*"Please, stop being [[human]]."
*"That is completely unnecessary."
*"We have much more important business here."
*"Please control your temper."
*"Are you finished yet?"
*"Please conserve your ammo."
*"Please stop firing your weapon."

''The Chief nears the Index Chamber''

*'''343 Guilty Spark:''' "We are near the Index chamber. Follow me."

''Spark flies over a wall separating a central chamber and the hallway the Chief is currently in. The Chief reaches, and goes through one of the rotating doors.'' 

''The Chief emerges into the large central chamber. Flood forms emerge behind the walls and approach the Chief.''

*'''343 Guilty Spark''': "The energy field above us contains the Index. We must get up there."

''The Chief comes to a huge locked door.''

*'''343 Guilty Spark''': "The security doors have sealed automatically. I will go access the override to open them."

''Spark flies through one of the tunnels. Flood forms assault the Chief. The Chiefs defends himself until Spark returns''.

*'''343 Guilty Spark''': "Please, follow closely. This portal is the first of ten."

''If the player goes the wrong way''.

*'''343 Guilty Spark''': "That is not the correct direction, Reclaimer. If you do not follow me, you may become lost."

''The Chief and Spark move into the next hallway. The Chief continues to fight the Flood.''

*'''343 Guilty Spark''': "Puzzling. You brought such ineffective weapons to combat the Flood, despite the containment protocols."

''The Chief, under Spark's lead, fights through the facility.''

*'''343 Guilty Spark''': "The Flood must not escape the installation. They consume all."

''They continue through the facility, going through another hallway.''

*'''343 Guilty Spark''': "You can see how the body has been transformed by the genetic restructuring of the Flood infection. The [[Pod infector|small creatures]] carry [[Flood spore|spores]] that cause a host to mutate. The mutated host then produces spores that can pass the Flood to others. It is insidious and elegant. As long as any hosts remain, the Flood is virulent."

''The Chief fights through yet another hallway.''

*'''343 Guilty Spark''': "We must continue. This way please."

''They go further down another hallway.''

*'''343 Guilty Spark''': "This installation's [[Flood research facility|research facilities]] are most impressive! Perhaps we'll have time to see them later."

''Spark sends a group of [[Aggressor Sentinel]]s to assist the Chief.''

*'''343 Guilty Spark''': "These Sentinels will supplement your combat system. But I suggest you upgrade to at least a Class Twelve combat skin. Your [[MJOLNIR Powered Assault Armor/Mark V|current model]] only scans as a Class Two, which is ill-suited for this kind of work."

''The Chief nears the first platform lift.''

*'''343 Guilty Spark''': "Pardon me. A plasma conduit breach in [[Section 5-5-2-4]] has disrupted power flow to a gravity maintenance assembly. Repairs require my attention. I will return soon."

''The Chief rides the first lift to the second floor.''

===Wait, It Gets Worse!===
''They move a short distance down the first hall of the second floor.''

*'''343 Guilty Spark''': "Flood activity has caused a failure in a drone control subsystem. I must reset the backup unit. Please, continue on. I will rejoin you when I have completed my task."

''The Monitor leaves temporarily, and soon returns to the Chief with the door open.''

*'''343 Guilty Spark''': "The Sentinels can use [[Sentinel beam|their weapons]] to manage the Flood only for a short time. Speed is of the essence."

''The Chief encounters another large door.''

*'''343 Guilty Spark''': "Please wait here."

''The Chief approaches another hallway on the second floor.''

*'''343 Guilty Spark''': "Your environment suit should serve you well when the Flood begins to alter the atmosphere. You are a good planner."

''The Chief once again fights through another hallway.''

*'''343 Guilty Spark''': "The installation was well conceived. It is surely the only way to end the Flood threat."

''The Chief finds and rides the second platform lift.''

===But I Don't Want to Ride the Elevator!===
''The Chief goes into the first hallway of the third floor.''

*'''343 Guilty Spark''': "I would conjecture that the [[Covenant|other species]] currently on the installation is responsible for releasing the Flood. They seem most persistent in their attempts to access restricted areas."

''The Chief comes into another hallway, but this time it's large, open, cavernous.''

*'''343 Guilty Spark''': "Why naturally the Flood is simply too dangerous to release, and mass sterilization protocols may again need to be enacted. Of course, samples were kept here after the [[Forerunner-Flood war|last catastrophic outbreak]]... for study. It seems... that decision may have been an error."

''The Chief enters another hallway.''

*'''343 Guilty Spark''': "The installation was specifically built to study and contain the Flood. Their survival as a race was dependent upon it. I am grateful to see that some of them survived to reproduce."

''The Chief reaches the third floor's locked door.''

*'''343 Guilty Spark''': "I will deactivate the security lock. Wait here."

''Spark once again leaves and returns to the Master Chief.''

''The Chief moves into yet another hallway, but this time with slightly more Flood forms.''

*'''343 Guilty Spark''': "Please stay close. Time is short."

''The Chief rides on the platform lift to the fourth floor.''

===Fourth Floor: Tools, Guns, Keys To Super Weapons===
''The Chief enters the first hallway of the fourth floor.''

*'''343 Guilty Spark''': "The Flood are already hard at work repairing [[UNSC Pillar of Autumn|your vessel]]. Its parasitic nature belies the Flood's intelligence."

''The Chief clears the route to the Index platform, fending off several remaining Flood forms. He reaches the platform.''

[http://www.youtube.com/watch?v=W0Lurm6e2RY '''{''Original Cutscene''}''']
[http://www.youtube.com/watch?v=ho5i6XzC8HE '''{Anniversary ''Cutscene''}''']

''The platform moves down to the lowest floor.''

*'''343 Guilty Spark''': "The energy barrier surrounding the Index will deactivate when we reach the ground floor."

''The platform's bottom ledges interlock with the ridges below, and it finally comes to a halt.''

[[File:IndexReleasedCEA.png|thumb|300px|John-117 acquires the Index.]]

*'''343 Guilty Spark''': "You may now retrieve the Index."

''The Chief walks slowly over to the Index, which is held in a protective sheath. The sheath unlocks itself as its sections move outwards before the Index itself pops slightly out of the top of the sheath. The Chief removes it and stares at it for a moment before 343 Guilty Spark zaps it from the Chief's hands and into some sort of trans-dimensional storage chamber inside the Monitor's body.''

*'''343 Guilty Spark''': "Protocol requires that I take possession of the Index for transport. Your organic form renders you... vulnerable to infection. The Index must not fall into the hands of the Flood, before we reach the [[Control Room (Installation 04)|Control Room]] and activate the installation."

''Spark and the Chief teleport away from the platform.''

*'''343 Guilty Spark''': "The Flood is spreading! We must hurry!"

''Fades to black.''

''Level ends.''

==Achievements==
The following [[achievement]]s can be unlocked on The Library across the [[Xbox 360]] and ''[[Halo: The Master Chief Collection]]'' editions of ''Halo: Combat Evolved Anniversary''. The original [[Xbox]] and [[Halo: Combat Evolved (PC port)|PC]] and [[Halo: Combat Evolved for Macintosh|Macintosh]] releases of ''Halo: Combat Evolved'' did not contain achievement unlocks.
{| class="wikitable"
|-
! scope="col" style="width:135px;text-align:center;" |'''''Halo: Combat Evolved Anniversary'' (Xbox 360)'''
! scope="col" style="width:135px;text-align:center;" |'''''Halo: MCC'' (Xbox One, Xbox Series X|S)'''
! scope="col" style="width:135px;text-align:center;" |'''''Halo: MCC'' (Steam)'''
! scope="col" style="width:175px;height:20px;text-align:center;" |'''Title'''
! scope="col" style="width:350px;height:20px;text-align:center;" |'''Unlock requirement'''
! scope="col" style="width:200px;height:20px;text-align:center;" |'''Games'''
|-
|[[File:HCEA Achievement The Library.png|center|64px]]
|[[File:HTMCC HCEA Achievement TheLibrary.png|center|114px]]
|[[File:HTMCC HCEA Achievement Steam TheLibrary.jpg|center|64px]]
|<center>'''[[The Library (achievement)|The Library]]'''</center>
|Complete The Library on any difficulty.
|<center>''[[Halo: Combat Evolved Anniversary]]''<br/>''[[Halo: The Master Chief Collection]]''</center>
|-
|[[File:ACH30.png|center|64px]]
|<center>[[File:HTMCC HCEA Achievement CloseQuartersCombat ThatJustHappened.png|center|114px]]</center>
|<center>[[File:HTMCC Achievement ThatJustHappened Steam.jpg|center|64px]]</center>
|<center>'''[[That Just Happened]]'''</center>
|Complete the level The Library on Heroic difficulty or higher without dying.
|<center>''[[Halo: Combat Evolved Anniversary]]''<br/>''[[Halo: The Master Chief Collection]]''</center>
|-
|[[File:ACH31.png|center|64px]]
|<center>N/A</center>
|<center>N/A</center>
|<center>'''[[Speed Reader]]'''</center>
|Complete the level "The Library" on Legendary difficulty in 30 minutes or less.
|<center>''[[Halo: Combat Evolved Anniversary]]''</center>
|-
|<center>N/A</center>
|[[File:HTMCC HCEA Achievement TLDR.png|center|114px]]
|[[File:HTMCC HCEA Achievement Steam TLDR.jpg|center|64px]]
|<center>'''[[TLDR]]'''</center>
|Beat the par time on The Library.
|<center>''[[Halo: The Master Chief Collection]]''</center>
|-
|<center>N/A</center>
|[[File:HTMCC HCEA Achievement ReadingRoom.png|center|114px]]
|[[File:HTMCC HCEA Achievement Steam ReadingRoom.jpg|center|64px]]
|<center>'''[[Reading Room]]'''</center>
|Beat the par score on The Library.
|<center>''[[Halo: The Master Chief Collection]]''</center>
|-
|<center>N/A</center>
|[[File:HTMCC HCEA Achievement Quiscustodietipsoscustodes.png|center|114px]]
|[[File:HTMCC HCEA Achievement Steam QCIC.jpg|center|64px]]
|<center>'''[[Quis custodiet ipsos custodes?]]'''</center>
|Find the [[Terminal (Halo: Combat Evolved Anniversary)|Terminal]] on The Library.
|<center>''[[Halo: The Master Chief Collection]]''</center>
|-
|<center>N/A</center>
|[[File:HTMCC HCEA Achievement SkulltakerBlackEye.png|center|114px]]
|[[File:HTMCC HCEA Achievement Steam SkulltakerBlackEye.jpg|center|64px]]
|<center>'''[[Skulltaker Halo: CE: Black Eye]]'''</center>
|Find the [[Halo: Combat Evolved Anniversary skulls#Black Eye|Black Eye Skull]] on The Library.
|<center>''[[Halo: The Master Chief Collection]]''</center>
|-
|<center>N/A</center>
|[[File:HTMCC HCEA Achievement SkulltakerEyePatch.png|center|114px]]
|[[File:HTMCC HCEA Achievement Steam SkulltakerEyePatch.jpg|center|64px]]
|<center>'''[[Skulltaker Halo: CE: Eye Patch]]'''</center>
|Find the [[Halo: Combat Evolved Anniversary skulls#Eye Patch|Eye Patch Skull]] on The Library.
|<center>''[[Halo: The Master Chief Collection]]''</center>
|}

==Production notes==
{{Main|Development of Halo: Combat Evolved}}
''The Library'' was primarily designed by [[Bungie]] designer [[Tyson Green]]. According to Tyson, the mission's design was inspired by the level ''"If I Had A Rocket Launcher, I'd Make Someone Pay"'' from ''[[Marathon]]'', and the first part of the ''[[Marathon#Marathon_2:_Durandal|Marathon 2]]'' level ''"Begging For Mercy Makes Me Angry!"''; specifically to create a level that had a feeling of "It's just you, your shotgun, and a the need to keep on moving.".{{Ref/Site|Id=TysonHBO|URL=https://forums.bungie.org/halo/archive4.pl?read=78958|Site=halo.bungie.org Forum|Page=The Library... *SP*|D=22|M=10|Y=2014}}

According to designer [[Jaime Griesemer]], the initial level design was "a giant vault", that would have had the player descend a "corkscrewing" staircase, with the activation index hovering and pulsating in the center. Flood forms would be able to jump to the player from different levels. However, the design was ultimately changed due to performance reasons, with walls being added throughout the level to reduce the number of objects being rendered, no longer allowing players to use the index as a constant point of reference to gauge their progression in the level.{{Ref/YouTube|Id=IGN|9ndZbg8Mr-Q|IGN|Halo: Combat Evolved Devs React to Speedrun (Martin O’Donnell, Marcus Lehto)}}

According to Tyson Green, ''The Library'' was the first level to implement Flood forms, and served as prototype level they would be developed on. At that time, the only NPC AI present in the mission were the [[Elite Combat Form]] and [[Carrier Form]]. The bare and extremely repetitive nature of the mission during this time started discussions over possibly removing a floor, but the action was deemed unfeasible; and eventually these worries were eased as 343 Guilty Spark, the Sentinels, and other Flood forms came online.{{Ref/Reuse|TysonHBO}}

Art Director [[Marcus Lehto]] designed the blue plasma screens in the hallways, while [[Paul Russel]] designed the patterns on the elevator floors.{{Ref/Reuse|IGN}}

The events of the level were later expanded in the novel ''[[Halo: The Flood]]''. One of the dead human combat forms found on the third floor in the level was identified as Staff Sergeant [[Marvin Mobuto]], who was brought to the Library by 343 Guilty Spark in an attempt to retrieve the index. Mobuto's body was described as mangled to the point where even the Flood could not make use of it. 

''The Library'' would become one of the most notorious levels in the ''Halo'' series. The length of the level has been criticized for being too long, and the layout was confusing and repetitive.{{Ref/Reuse|IGN}}{{Ref/Film|Id=Commentary|[[Halo 3 Legendary Edition|''Halo 3'' Legendary Edition]], Halo: Combat Evolved developer commentary}} When reflecting on the level, lead designer Tyson Green had said "If I had to all to do again, I'm sure the level would be shorter, but no less difficult.".{{Ref/Reuse|TysonHBO}} In an attempt to help counter this, the ''Anniversary'' graphics made the colored lighting themes for each floor of the Library far more blatant and noticeable than before, to at least give the floors stronger visual distinctions.{{Ref/Film|[[BTS: Anniversary Campaign]]}}

The layout of the Library was briefly reused for the Library of [[Installation 05]] during the final section of the ''[[Halo 2]]'' campaign level ''[[Quarantine Zone]]''.

==Trivia==
===Glitches===
{{main|Glitches}}
*If the player has an [[Overshield]], it is possible to launch him/herself onto the Activation Index. The player can fall to the bottom of the place right below this post and survive.
*On the second elevator ride, if the player get high enough, jump off and get under it, the player can make their way to the center of the chamber and jump into the pit. There a spinning Forerunner [[Monitor]], 343 Guilty Spark, can be seen. Oddly enough, the player can also do this while 343 Guilty Spark is supposedly on another part of the level at the time.
*If there are any Flood corpses on the elevator during the cutscene, the corpse will start bouncing and it will keep going all the way down to the bottom until the elevator stops.
*In ''[[Halo: Combat Evolved Anniversary]]'', there is an error in the geometry of the remastered graphics on the top floor, with the yellow lighting. One specific part of the floor features a dead-end corridor with a health pack with two pillars sticking up, a common sight in the level. But the remastered graphics in this instance places a flat wall texture across at the part of the corridor where the pillars begin. This means the player can walk between the pillars and through the "wall" into what appears to be empty space, where they can see behind the walls of the level.

===Easter eggs===
* The [[Halo: Combat Evolved Anniversary skulls#Black Eye skull|Black Eye skull]] is located in a vent before entering the Index chamber for the first time. On the first floor at the beginning of the level, you will notice squarish openings in the ceiling that the flood use to enter the level. Before entering the round, yellow room, find the vent closest to that door and do a grenade jump into it. The skull will be waiting for you.
* The [[Terminal (Halo: Combat Evolved Anniversary)#The Terminals|seventh Terminal]] is located on the Library's third floor. You will eventually come to the index chamber - a large circular room, with the Index platform above it. Go either right or left and jump over the low barriers until you get to the opposite side. The terminal flashes yellow, and can be clearly seen across the chasm.
* The [[Halo: Combat Evolved Anniversary skulls#Eye Patch skull|Eye Patch skull]] is behind the Index on the final platform. Instead of running onto the platform to grab the Index, go around while remaining as far from the Index as possible. The skull will be waiting on the ground right behind it.

===Mistakes===
*In the beginning cutscene, the container holding the Activation Index unlocks, revealing it for two seconds before the animation by what is seen appears to have restarted since the Index seems to disappear as if the container was never even opened. This might have been caused by a scripting error.
*In the last cutscene, the Master Chief appears to stand on a transparent glass surface while retrieving the Activation Index. However nothing was really modeled and the Chief was standing on emptiness: it was a bug that Bungie forgot to fix. It was not fixed in ''Halo: Combat Evolved Anniversary''.

===References===
*The chapter "Fourth Floor: Tools, Guns, Keys To Super Weapons" is referenced in ''[[Halo: Reach]]'s'' campaign level ''[[Long Night of Solace (level)|Long Night of Solace]]'' with the chapter title "First Floor: Aliens, Beaches, Secret Launch Stations." It is also referenced in the ''[[Halo Wars 2]]'' achievement for completing the level ''[[The Foundry]]''. The achievement's title is "[[Fifth Floor: Tools, Guns, Super Weapons]]."

===Miscellaneous===
*In the Korean version of ''Halo: Combat Evolved'', this level is named as "''Finding the Index''".{{citation_needed}}
*The blue-lighted windows seen throughout the level are rumored to be used to access the data archived by the [[Librarian]] although this has never been seen in any of the games thus far. In addition, they are described as "glowing blue monitors" in ''Halo: The Flood''.
*Opening this file in a modding program will reveal a Flood actor variant with a [[M7057 flamethrower|flamethrower]]. However no such Flood form spawns in the level due to the fact that in the [[Xbox]] version of the game the flamethrower was unfinished, even though the [[Halo: Combat Evolved (PC port)|PC version]] of this level does contain a working flamethrower (which also doesn't have a spawn point as a random piece of weaponry lying around).
*Whenever Sentinels are deployed to escort the Monitor, they only follow him until they reach certain landmarks such as the series of pillar-like braces occasionally found in the middle of corridors. There is a possibility that the braces are actually devices used to mark the areas where Sentinels which are permitted to occupy. Another theory could be that the braces found in areas serve as signs that the Sentinels found within the Library are not allowed to wander outside of certain perimeters.
*In the Anniversary version of the level there is a small portion of the previously mentioned brace-like structures that can be broken off by means of grenade explosions.
*Also in the Anniversary version, the decorations on the Library's walls resemble the monoliths/petals that surround the [[Portal at Voi]].
*"Learn to Read!" - The Cursed Halo description of the level as of 2023.
==Gallery==
===''Halo: Combat Evolved''===
<gallery>
File:HCE Menu 07 The Library.png|Preview of the level in ''Halo: Combat Evolved'' menu.
File:HCE-TeleportationGridRings-screen6.png|343 Guilty Spark and John arriving at the Library via teleportation.
File:H1 Library assault.jpg|John battles through waves of Flood forms to get to the index chamber.
File:HCE LibraryFight.jpg|Various Flood forms attacking John.
File:Libraryon04.jpg|A view of the index chamber on the Library's top floor.
File:HCE-LibraryIndexChamber-screen3.png|A top-down view of the platform moving to the bottom floor.
File:LibraryonAlphaHalo.jpg|The platform lowered to the bottom floor of the index chamber.
File:HCE-RetrievingActivationIndex-screen1.png|John about to retrieve the activation index.
File:HCE-RetrievingActivationIndex-screen2.png|The index pops out of its holding device.
File:HCE-HoldingActivationIndex-screen.png|John holding the activation index.
</gallery>

===''Halo: Combat Evolved Anniversary''===
<gallery>
File:HCEA-pavel-belov-library-concept1.jpg|Concept art of the index chamber in ''Halo: Combat Evolved Anniversary''.
File:HCEA-pavel-belov-library-concept2.jpg|Concept art of the hallways in ''Halo: Combat Evolved Anniversary''.
File:HCEA-pavel-belov-library-concept3.jpg|Concept art of the index chamber in ''Halo: Combat Evolved Anniversary''.
File:HCEA Menu 07 Library.png|Preview of the level in ''Halo: Combat Evolved Anniversary'' menu.
File:HCEA ChiefLibrary.JPG|John wielding a shotgun in the lower floors of the index chamber.
File:HCEA-ActivationIndexChamber.png|A view of the index chamber on the Library's top floor.
</gallery>

==Sources==
{{Ref/Sources}}

{{succession box | before = ''[[343 Guilty Spark (level)|343 Guilty Spark]]'' <br />| title = [[Halo: Combat Evolved#Campaign|''Halo CE'' Campaign Missions]] | years = '''''The Library''''' |after = ''[[Two Betrayals]]''}}

{{Levels|H1}}