Steam Community :: Guide :: Portal 2 Co-Op with Nvidia Surround
Portal 2: Co-op Splitscreen Multiplayer Gameplay Walkthrough - GOOD GAME | Part 2
Portal 2 on Steam adds split-screen to co-op mode, Big Picture support - Polygon
Playing splitscreen for the first time. How do I switch which side of the screen I appear on? I want to be on the left not the right. I'm playing on mouse
Steam Community :: Guide :: How to play Local Co-op with Controller + Keyboard
Portal 2 just got a new update, and it improves local cooperative play | PC Gamer
Portal 2 PC finally gets split-screen co-op | Eurogamer.net
Portal 2 Patch Tweaks Co-op, Adds Split-Screen Via Remote Play
8 Best Split Screen games on Steam as of 2024 - Slant
Co-Optimus - Review - Portal 2 Co-Op Review
Portal 2: Confinement on Steam
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
Co-Optimus - News - Valve Updates Portal 2 With an Official PC Split-Screen Co-Op Mode
Portal 2 on Steam adds split-screen to co-op mode, Big Picture support - Polygon
Portal 2 Gets Split-Screen Support in Big Picture Mode | Tom's Hardware