Portal 2 PS3: Redeeming the PC copy - YouTube
Valve's Erik Wolpaw on Portal 2's difficulty, PS3 Steam features | Engadget
Valve Reveals Portal 2 for PlayStation 3: Steam Details – PlayStation.Blog
Getting Portal 2 for PS3 seemed like a good idea at the time, what with getting it on Steam for free. : r/gaming
How Does Steam Work On the PS3? - GameRevolution
Portal 2 to have PC & PS3 Co-op - SteamUnpowered
Amazon.com: Portal 2 - Playstation 3 : Video Games
Does anyone know the name of the PS3 menu theme for Portal 2? : r/Portal
Portal 2 PS3 Edition To Have Cross-Platform Play, Other Steam Features | TechCrunch
PS3 Cheats - Portal 2 Wiki Guide - IGN
Valve permanently drops Portal 2's price to $29.99 on Steam | VG247
Is Sony thinking about buying Valve and Steam for the PlayStation 5?
Portal 2 PS3 code anyone? Enjoy. : r/gaming
Portal 2: Pretty Much Every PS3 Question Answered (and that Cake thing, too) – PlayStation.Blog
Portal 2 - Wikipedia
Portal 2: Pretty Much Every PS3 Question Answered (and that Cake thing, too) – PlayStation.Blog
Valve bringing Steam-supported Portal 2 to PS3 in April - CNET
Portal 2 • PS3 – Mikes Game Shop
Valve hopes Steam for PS3 will support more than Portal 2 – Destructoid
Valve talks Portal 2 on PlayStation 3, Steam on 360 | Ars Technica
Steam Community :: Guide :: How to play Local Co-op with Controller + Keyboard
Buy Portal 2 PS3, get PC/Mac version free & Steam support – Destructoid
