The highly anticipated sequel to 2007's Game of the Year Portal 2 is a hilariously mind-bending adventure that challenges you to use wits over weaponry in a funhouse of diabolical science Using a highly experimental portal device you'll once again face off against a lethally inventive power-mad AI named GLa DOS & this time you won't be alone Meet an expanded cast of characters as you think your way through dangerous never-before-seen areas of Aperture Laboratories Break the laws of spatial physics in ways you never thought possible with a wider variety of portal puzzles & an expansive story that spans a single player & co-operative game mode Portal 2 is a unique first-person Action-Puzzle-Platforming game that tests player's ability to think & act creatively as they use the game's ingenious wormhole creating portal gun to produce their own paths through otherwise sealed surfaces & across the open spaces of the game Sequel to the original Portal game -- the surprise add-on hit included in Valve Corporation's 2007 release The Orange Box -- Portal 2 continues the storyline from the first game featuring both new & returning characters & poses a range of new challenges making for a much deeper game Additional features include a new two player co-op mode & an original soundtrack Portal 2 game logo An old test chamber from Portal 2 Enjoy an expanded storyline as you return to Aperture Laboratories to match wits with GLa DOS View larger Atlas & P-body from Portal 2 New characters & functionality expand the Portal gameplay experience View larger Welcome Back to Aperture Laboratories In Portal 2 players awake in the Aperture Science Labs as Chell the heroine of the original game A great expanse of time has passed since the conclusion of the first game & the gameworld has fallen into visible disrepair but placed in suspended animation Chell has survived intact & is revived With the