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 Patch Tweaks Co-op, Adds Split-Screen Via Remote Play
Portal Companion Collection for Nintendo Switch - Nintendo Official Site