Critic score: 95/100

User score: 8.4/10

Plot summary (from Metacritic): "Portal 2 is the sequel to the title named "Game of the Year" 2007 by over 30 publications around the world. Portal 2 promises to break new ground in next generation gaming by expanding the award-winning recipe of innovative gameplay, immersive story, and creative inclusion of music while also introducing multiplayer co-op game modes."