Co-Optimus - News - How to Play Portal 2 Split Screen on Your PC
Portal 2 first game to have cross platform multiplayer
Play Portal 2 on PS3 without a HDD install | Attack of the Fanboy
PC Cheats - Portal 2 Guide - IGN
Amazon.com: Portal 2 - Playstation 3 : Video Games
Portal 2 on PS3 was the only Valve game on console to be cross play and cross progressions with PC via logging into steam on your PS3 and you'd get steam achievements +
PC, PS3 Owners Can Play Portal 2 Together | WIRED
portal 2 PS3 activate the product for pc :: Help and Tips
Portal 2: Pretty Much Every PS3 Question Answered (and that Cake thing, too) – PlayStation.Blog
Buy Portal 2 for PS3 and get the Mac version for free
30 Best Multiplayer Co-Op PS3 Games (Local & Online) – FandomSpot
Portal 2 In Motion' blurs the line between your Portal gun and you - Polygon
Portal 2 (PS3) Gameplay Part1 - YouTube
Portal 2 disc has CoD Black Ops on it. Did I buy a fake? : r/PS3
No PS3 Portal 2 Move support after all - GameSpot
Getting Portal 2 for PS3 seemed like a good idea at the time, what with getting it on Steam for free. : r/gaming