Steam for PS3 Portal 2 detailed - GameSpot

Puzzle-platformer will offer cross-platform gameplay, matchmaking, friends list, achievements, cloud saves, and chat via Valve's online service on Sony's console.
Portal 2 is a first-person puzzler game from Valve Software that draws from the original formula of innovative gameplay, story, and music, which earned the original Portal more than 70 industry accolades.

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