Portal 2 - Wikipedia
Review: Portal 2 – Destructoid
Portal Companion Collection review - This was a triumph - GAMING TREND
Buy Portal 2 PS3, get PC/Mac version free & Steam support – Destructoid
Portal 2 Co-Op Hands-On - GameSpot
/cdn.vox-cdn.com/uploads/chorus_image/image/49878031/maxresdefault.0.0.jpg "Portal 2 and Left 4 Dead are the Xbox One's newest backward-compatible titles - Polygon")
Portal 2 and Left 4 Dead are the Xbox One's newest backward-compatible titles - Polygon
Portal 2
Co-Optimus - News - How to Play Portal 2 Split Screen on Your PC
Microsoft Rejected 'Portal 2' Steam Integration, Cross-Platform Play
/cdn.vox-cdn.com/uploads/chorus_asset/file/13668277/screenshot_8.jpg "Portal and Portal 2 coming to Nintendo Switch - Polygon")
Portal and Portal 2 coming to Nintendo Switch - Polygon
Multi-Platform - TV Tropes
Portal 2 first game to have cross platform multiplayer
Everything You Need To Know About Portal 2 - Game Informer
Steam for PS3 Portal 2 detailed - GameSpot
Portal 2 review | Adventure Gamers
Portal 2 | Xbox One X 4K Gameplay - YouTube
Co-Optimus - Review - Portal 2 Co-Op Review
Games with Gold: Portal 2 goes free and becomes final Xbox 360 title on offer - Neowin
Buy Portal 2 | Xbox
Amazon.com: Portal 2
Portal 2 gets cross-platform play across PC, Mac and PlayStation 3 | WIRED UK
Xbox 360 Cheats - Portal 2 Wiki Guide - IGN
PC, PS3 Owners Can Play Portal 2 Together | WIRED
Buy Portal 2 Xbox One Compare Prices
Portal 2 - PlayStation 3 Standard Edition: Playstation 3: Video Games - Amazon.ca
Free Portal 2 In Motion co-op DLC out today on PlayStation 3 | Engadget
