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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Portal 2 Graphics Comparison - GameSpot

Valve Reveals Portal 2 for PlayStation 3: Steam Details – PlayStation.Blog

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Portal Ps3

News - Portal 2 Official Blog

Portal 2 sells 4 million - Report - GameSpot

Portal 2 (Sony PlayStation 3, 2011) for sale online

Steam (service) - Wikipedia

Catch Up on Portal 2 - GameSpot

Fun fact: only four games have gotten perfect 10s from IGN, GameSpot, Edge, and EGM : r/gaming

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PlayStation Portal, Sony's New (Sort Of) Gaming Handheld, Is Coming This Year For $200 - GameSpot

Steam na PS3 - Portal 2