Gamers can play “Portal” on their PCs through Steam or by buying the official game disc from online retailers such as Amazon.com. The sequel to the game, “Portal 2,” is available on home consoles such as the Xbox 360.
Valve Corporation developed “Portal” in 2007. The game involves platforming and puzzles, and it's set in first-person perspective. Valve released the game in a bundle for the Xbox 360 called “The Orange Box.” In April 2008, it released a standalone version of the game called “Portal: Still Alive” for the Xbox Live Arcade.
The main goal of “Portal” is to help the main protagonist, Chell, navigate through a series of rooms at a laboratory using the Aperture Science Handheld Portal Device. This device allows the player to create portals and jump through them to solve puzzles. These puzzles typically involve the player trying to get to out-of-reach locations.
During the game, the player has to interact with an artificial intelligence robot named GLaDOS, which is short for Genetic Lifeform and Disk Operating System. GLaDOS pokes fun at the player often by telling him to do something and then scolding them for doing so. An example of this is when GLaDOS doesn't let the player move on until he burns his companion cube. As soon as the player burns his cube, GLaDOS remarks that she can't believe that the player did that.