Portal 2 draws from the award-winning formula of innovative gameplay, story, and music that earned the original Portal over 70 industry accolades and created a cult following.
The single-player portion of Portal 2 introduces a cast of dynamic new characters, a host of freshpuzzle elements, and a much larger
set of
devious test chambers. Players will explore never-before-seen areas of
the Aperture Science Labs and be reunited with GLaDOS, the occasionally
murderous computer companion who guided them through the original
game.
The game’s two-player cooperative mode features its own entirely
separate
campaign with a unique story, test chambers, and two new player
characters. This new mode forces players to reconsider everything they
thought they knew about
portals. Success will require them to not just act cooperatively, but to think cooperatively.