Portal
Plot
The game starts with Chell waking up in a small glass room that has only a bed, a toilet, and a radio inside. She is told by GLaDOS that testing will start soon, and an orange portal opens on one of the walls. Once the player goes through, she enters the testing rooms and begins testing. There are 19 testing rooms, called Test Chambers, in all.
The tests start out simple. Chell has to pick up boxes, called Weighted Storage Cubes (Cubes for short), and put them on buttons, which will open the door to the exit of the chamber. At this point, GLaDOS speaks to Chell as a guide, praises her, and promises her cake when the tests are over. Near the beginning of the game, Chell gets the Aperture Science Handheld Portal Device, also known as the Portal Gun. At first, her Portal Gun only makes blue portals and the orange portals are made by GLaDOS. Later, Chell gets the complete Portal Gun and can make both blue and orange portals.
The tests become more and more dangerous farther into the game. In some rooms, there is deadly acid on the floor. In others, there are balls of electricity called High Energy Pellets which will kill Chell if she touches them. During these tests, GLaDOS becomes more and more sarcastic, giving Chell useless advice, such as "The floor here will kill you. Try to avoid it." At one point, GLaDOS tells Chell a chamber is broken and she must go through a chamber full of sentry guns, called Turrets, instead. If a Turret sees Chell, it will shoot at her until she dies. In this chamber is a hidden room. In the hidden room are drawings and writing on the walls left by an unknown person. The writing says things like "the cake is a lie" and "she's always watching" with a picture of a camera. There are more rooms like this in later chambers.
In another chamber, Chell has to use the Weighted Companion Cube, which looks like a Weighted Storage Cube with hearts on it, to solve the test. During the test, GLaDOS tells Chell several times that the Companion Cube is not alive, but at the end of the test, she tells Chell she has to "kill" the Companion Cube to get to the next test.
