Portal 2 In Motion: Free Co-op Campaign Out Today – PlayStation.Blog
Portal 2 PC Splitscreen CO-OP Fun Gameplay - YouTube
9 Awesome Split Screen PC Games for Couch Co-Op Gaming
Uhh wtf? What's happening here? (Portal Reloaded coop in split screen, as I can't find ppl. btw it's so damn confusing, and I've played the whole singleplayer campaign...) : r/Portal
Portal 2 Gets Split-Screen Support in Big Picture Mode | Tom's Hardware
The best co-op games on PC 2023 | PCGamesN
The best split-screen games for PC | Digital Trends
TIL: Portal 2 does not support UW splitscreen properly :( : r/ultrawidemasterrace