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.

Portal 2 opening on PS3? - GameSpot

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

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

Portal 2: Pretty Much Every PS3 Question Answered (and that Cake thing, too) – PlayStation.Blog

Portal 2 Walkthrough - GameSpot

How to Get the Epic Games Store Running on Steam Deck - CNET

Portal 1 & 2 On Switch Compared To Other Platforms

The 40 most anticipated games of 2011 (photos) - CNET

Assassin's Creed Mirage Review - Back To Basics, GameSpot