Steam Community :: Guide :: How-To: Play Workshop Coop Maps Solo
Portal 2 Patch Tweaks Co-op, Adds Split-Screen Via Remote Play
Portal 2: Reflection and Cooperation - Médiation thérapeutique avec les Jeux Vidéo
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
33 Best split-screen PC games as of 2023 - Slant
Portal 2: Co-op Splitscreen Multiplayer Gameplay Walkthrough - GOOD GAME | Part 2 - YouTube
Portal 2 Gets Split-Screen Support in Big Picture Mode | Tom's Hardware
PC gamers can now play Portal 2 split-screen | PCGamesN
Portal 2 on Steam adds split-screen to co-op mode, Big Picture support - Polygon
Portal 2 PC finally gets split-screen co-op | Eurogamer.net
20 Best Split Screen Games for PC to Play in 2023 | Beebom