Portal 2 PC - local co-op (splitscreen) gameplay - YouTube
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Portal Knights - Vertical split screen is being added to Portal Knights as part of Update v 1.1, coming soon to both PC and console! We know this is a popular request,
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Steam Community :: Guide :: How to play Local Co-op with Controller + Keyboard
Steam Community :: Guide :: How to play Local Co-op with Controller + Keyboard
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Portal 2 PC Split-Screen Tutorial with Controller + Keyboard, Mouse - YouTube
TIL: Portal 2 does not support UW splitscreen properly :( : r/ultrawidemasterrace
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Portal 2 Patch Tweaks Co-op, Adds Split-Screen Via Remote Play
Amazon.com: Portal 2 - Playstation 3 : Video Games
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Portal 2 Splitscreen and Online Co-Op Detailed.
:format(jpeg)/cdn.vox-cdn.com/uploads/chorus_image/image/3690235/portal_2.0.jpg "Portal 2 on Steam adds split-screen to co-op mode, Big Picture support - Polygon")