
At the same time, a Rocket Turret emerges from a core hatch beside GLaDOS and begins to target Chell. With the Core destroyed, GLaDOS releases neurotoxin into the chamber in an attempt to kill Chell. Chell destroys it using a nearby Emergency Intelligence Incinerator, however the Core is revealed to be a safeguard designed to inhibit GLaDOS' homicidal tendencies. GLaDOS claims that she will provide Chell with a surprise, however a Morality Core unexpectedly detaches from GLaDOS' chassis. Upon entry to the chamber, Chell is greeted by the passive-aggressive rogue AI. Eventually however, Chell realizes there there is no chance of escape as long as GLaDOS is in control of the Facility, and is forced to confront GLaDOS in the Central AI Chamber. Dubious as to the veracity of this claim, Chell escapes the testing course, and travels through the Aperture Science Facility in an attempt to reach the surface and escape. The Rat Man's warnings are eventually revealed to be correct, as GLaDOS attempts to murder Chell upon her completion of the final test chamber, despite earlier promises of cake.Ĭhell successfully escapes the dramatically slow death trap, and is informed by GLaDOS that pretending to kill Chell is simply part of the test. Chell, now made more aware of her situation, is forced to continue testing and play along with GLaDOS' plans. The scribblings on the walls in these Dens appear to be warnings for Chell, telling her that "the cake is a lie" and that "she's watching you". As she enters these maintenance areas, she finds refuge areas commonly known as the Rat Man's Dens, previously used as hiding places by Aperture technician Doug Rattmann. As an incentive to complete the tests, GLaDOS promises Chell that cake will be served once all tests chambers have been completed.Īs the testing progresses, Chell stumbles across various areas with defunct wall panels, and manages to sneak into them. Eventually, the single-portal variant of her Portal Gun is upgraded to create a set of linked portals. Skillfully avoiding these hazards, Chell is assisted by the Companion Cube and by the Aperture Science Advanced Knee Replacement components applied to the back of her lower legs to her ankles, which allow Chell to avoid injury when falling from great heights.

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Later on during the testing course, she is put through a series of more dangerous tests including hazards such as Goo and High Energy Pellets, among others. Having completed two tests, Chell reaches a test chamber in which she acquires the Portal Gun.

After completing her first test and acquiring an understanding the cube-and- button based mechanic, she is put through a series of tests to further explore and understand the use of portals. Chell exits from the Vault, however she notices empty observation rooms which lack the staff that should be recording her performance. GLaDOS then generates two oval-shaped teleportation fabrics ( portals) on a solid flat surface, with an entrance portal in the Relaxation Vault and an exit just in front of the exterior of the Vault. A voice, (later to be revealed as GLaDOS) then states that Chell will be undergoing testing for the benefit of Aperture Science's research program. Curious, she explores the Vault, and within only ten seconds of awakening, Chell is greeted by a robotic and seemingly automated female voice who informs her that she is a test subject. Some time after GLaDOS' takeover of Aperture Science, Chell is awakened in a Relaxation Vault after being unconsciously placed into it.


Many of GLaDOS' comments throughout Portal 2 and the latter stages of Portal are in an effort to belittle, annoy or distract Chell from achieving her goal, and whether or not statements of her adoption and orphan status are true or not is up for debate.ĭuring the events of Portal 2, it is implied that Chell may be the daughter of a scientist who worked at Aperture Science. During the final events of Portal, GLaDOS mentions numerous times that Chell was abandoned at birth, and also mentions that she was adopted, and such references continue throughout Portal 2, although the credibility of GLaDOS' word is unclear.
