How To] Play Portal 2 Split Screen and With 2 PC or PS2 USB Controller Tutorial - YouTube
TIL: Portal 2 does not support UW splitscreen properly :( : r/ultrawidemasterrace
Portal 2 PC adds splitscreen co-op - GameSpot
Portal 2 Gets Split-Screen Support in Big Picture Mode | Tom's Hardware
Portal 2 PC - local co-op (splitscreen) gameplay - YouTube
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 PC Split-Screen Tutorial with Controller + Keyboard, Mouse - YouTube
Portal Companion Collection for Nintendo Switch - Nintendo Official Site
Portal 2 PC Splitscreen CO-OP Fun Gameplay - YouTube
Portal 2 Splitscreen and Online Co-Op Detailed.
Portal 2 PC finally gets split-screen co-op | Eurogamer.net
Portal 2 Coop Split-Screen - YouTube
Save 90% on Portal 2 on Steam
Co-Optimus - News - Valve Updates Portal 2 With an Official PC Split-Screen Co-Op Mode