Portal 2

Portal 2 is a first-person video game developed and published by Valve Corporation. It is the sequel to the game Portal which was released in 2007. It is set to be released on April 18, 2011 for PS3, PC and Xbox 360.

Like Portal, Portal 2 primarily consist of a series of puzzles that must be solved by teleporting the player's character and simple objects using the "portal gun". The single-player introduces a cast of new characters, a much larger set of devious test chambers and a host of fresh puzzle elements. The two-player mode features its own entirely separate campaign with a unique story, two new player characters and test chambers.