Portal is a game where you play as Chell, a test subject, and navigate through a series of tests created by Aperture Science, a company that specializes in science, but not really.
Using a portal gun that can create two portals at once, you can solve puzzles and advance through levels.
But beware! The company's AI, GLaDOS, is trying to kill you. She's not the friendliest voice in the world.
You can also play as other characters in the game, such as: Atlas
Or: Other characters