Portal 2 draws from the award-winning formula of innovative gameplaystory, and music that earned the original Portal over 70 industryaccolades and created a cult followingThe single-player portion of Portal 2 introduces a cast of dynamic newcharacters, a host of fresh puzzle elements, and a much larger set ofdevious test chambers. Players will explore never-before-seen areas ofthe Aperture Science Labs and be reunited with GLaDOS, the occasionallymurderous computer companion who guided them through the original game.