Portal 2

Portal 2  is a 2011  puzzle-platform  video game developed by  Valve  for  Windows ,  Mac OS X ,  Linux ,  PlayStation 3 , and  Xbox 360 . The digital PC version is distributed online by Valve's  Steam  service, while all retail editions were distributed by  Electronic Arts . A port for the  Nintendo Switch  was included as part of  Portal: Companion Collection . Like the original  Portal  (2007), players solve puzzles by placing portals and teleporting between them.  Portal 2  adds features including tractor beams, lasers, light bridges, and paint-like gels that alter player movement or allow portals to be placed on any surface. In the  single-player  campaign, players control  Chell , who navigates the dilapidated  Aperture Science Enrichment Center  during its reconstruction by the supercomputer  GLaDOS  ( Ellen McLain ); new characters include robot  Wheatley  ( Stephen Merchant ) and Aperture founder  Cave Johnson  ( J. K. Simmons ). In the new cooperative mode, players solve puzzles together as robots Atlas and P-Body (both voiced by  Dee Bradley Baker ).  Jonathan Coulton  and  the National  produced songs for the game. Valve announced  Portal 2  in March 2010, and promoted it with  alternate reality games  including the  Potato Sack , a collaboration with several  independent game developers . After release, Valve released  downloadable content  and a simplified  map editor  to allow players to create and share levels. Portal 2  received critical acclaim for its gameplay, balanced  learning curve , pacing,  dark humor , writing, and acting. Like its predecessor, it has been described as one of the  greatest video games ever made  by numerous publications and critics.