History Characters / GTFO

A colossal beast filled with tentacles found in the alternate dimension/planet.

* AchillesHeel: Most of its body is invulnerable, but it bears several tumors that can be harmed by the players, and after enough of them have been destroyed the boss will die.
* AttackItsWeakPoint: The only way to kill it is by destroying bioluminescent spore-like organs across its body.
* AttackOfThe50FootWhatever: It is so massive that it isn't seen in its entirety, even at the facility where it fought, which is clearly at a high position, with it having risen from a thick fog around the location. In Rundown 8.0 however, multiple ones appear with their entire bodies visible, showing that they are able to float, bearing a gigantic [[NightmareFace "face"]] right below the body parts seen in 6.0, and even larger tentacles beneath it.
* BackgroundBoss: It emerges in front of a facility on a cliff where the players are, and never actually moves out of its position, only being able to send its projectiles and minions towards the players from it.
* EldritchAbomination: It is a gigantic, bioluminescent monster that bears many characteristics possessed by the Sleepers found in the Complex, whose "mouth" contains countless tentacles and spikes, the latter of which can be used as ''homing projectiles'', and can spawn Flyers. It also helps that it is found in the alternate dimension/planet.
* FlunkyBoss: It frequently spawns Flyers to attack the players, while the boss itself has only a few attacks of its own and doesn't even move.

* TacticalSuicideBoss: Most of its body is impenetrable, but a bioluminescent tumor that can be destroyed will appear shortly after it first appears, and once one is destroyed another will spawn until the Kraken is killed.

* WeHardlyKnewYe: They seem to have incredibly short lifespans, with the last one to speak with Schaeffer in ALT://Rundown 6.0 only lasting a few minutes before expiring.

* AlternateSelf: An AlternateUniverse version of John Schaeffer, who instead of trying to escape by fighting against the Warden, seeks to understand it's reasons for keeping himself and others as prisoners.

* VillainousBreakdown: [[spoiler: Goes through a hard one once be notices the protagonists won't follow his plans anymore, bringing him to rant about them, saying that they are nothing but criminals, only to later [[AintTooProudToBeg beg]] them not to leave him alone.]]

* WalkingSpoiler: Used to have a mostly spoiler-free section, but ever since Rundown 8.0, he has become the center of many central plot points in the story.

* MouthOfSauron: [[InvertedTrope Inverted]]. They serve as the Warden's mouthpiece, though as their last revelation shows, the latter is [[GoodAllAlong not]] as malevolent as the prisoners believed.

* SpannerInTheWorks: [[DownplayedTrope Downplayed]]. Like his counterpart, he is the only prisoner known to have escaped the Warden's control, but decided to understand its [[ExtradimensionalEmergencyExit motives]] instead of outright fighting it, and went on to complete its goal himself along with the protagonists.

* WalkingSpoiler: The very fact that he isn't the John Schaeffer from the original rundowns makes him this, as well as how much he and his counterpart are opposites, taking actions that repeatedly contradict the other's.

* WalkingSpoiler: Used to have a mostly spoiler-free section, but ever since the Rundown 8.0, he has become the center of many central plot points in the story.

* WalkingSpoiler: The very fact that he isn't the John Schaeffer from the original rundowns makes him this.

* RapidAging: They have an extremely short lifespan once "activated", with the one who Schaeffer spoke to only lasting a few minutes.

* TheUnseen: The Warden never makes a physical appearance in the game, it only communicates through orders given to the prisoners. [[spoiler: ALT://Rundown 6.0 reveals that it possesses "conduits", which speak on its behalf, but never had a chance to comnunicate with the prisoners until then.]]

* NotOfThisEarth: [[spoiler:It is part or was made by an alien faction known as the Collectors, who use it as a way to find a universe lacking the NAM-V contamination.]]

* SanitySlippage: His paranoia towards the Warden gradually worsens throughout time, to the point he defies it even when it is unnecessary, [[spoiler: despite this later in story meaning certain death to every person inside the Complex.]]

* AlternateSelf: [[spoiler: Due to a [[WhenDimensionsCollide Matter Wave Collapse]] occurring, there are two versions of the main team, one guided by a version of John Schaffer that is collaborating with the Warden, and another by an EvilCounterpart of the same but that has rebelled against it.]]