Free Portal 2 In Motion co-op DLC out today on PlayStation 3 | Engadget
Portal 2 will let PC and PS3 gamers play together | PC Gamer
Portal 2 - Bring a Friend | Portal 2
Steam Community :: Guide :: How to play Local Co-op with Controller + Keyboard
Portal 2 Full Co-Op Trailer for PlayStation 3 - Metacritic
Portal 2 Updated More Frequently on PS3
Review: Portal 2 (PS3) | Daily Mail Online
Portal 2 - Wikipedia
Portal 2 - Wikipedia
Portal 2: Pretty Much Every PS3 Question Answered (and that Cake thing, too) – PlayStation.Blog
Portal 2 PC finally gets split-screen co-op | Eurogamer.net
Portal 2 PC finally gets split-screen co-op | Eurogamer.net
50 Best PS3 Co-Op Games of All Time
Portal 2 PC, PS3, Xbox 360, Mac review - DarkZero
Portal 2 Co-op Walkthrough Video Guide (PC, Xbox 360, PS3) - Video Games Blogger
Steam Community :: Guide :: How to play Local Co-op with Controller + Keyboard
30 Best Multiplayer Co-Op PS3 Games (Local & Online) – FandomSpot
30 Best Multiplayer Co-Op PS3 Games (Local & Online) – FandomSpot
25 Best Couch Co-Op Games on PS3 to Play With Friends
Portal 2 first game to have cross platform multiplayer
Amazon.com: Portal 2 PS3 : Video Games
PC, PS3 Owners Can Play Portal 2 Together | WIRED
Co-Optimus - News - How to Play Portal 2 Split Screen on Your PC
Portal 2: Pretty Much Every PS3 Question Answered (and that Cake thing, too) – PlayStation.Blog
Portal 2 GAME MOD Portal 1 Multiplayer In Portal 2 Co-op v.8 - download | gamepressure.com
Core Portal 2 game is the same "whether you buy it on PS3 or 360", says Valve | VG247
