Can I play any Steam game on a Steam Deck?
Yes to all. Only consider some games have some anticheat systems that make the game unplayable on SteamOS, but you can install windows on Deck so technically you can play all on steam deck. SteamOS Game Compatibility SteamOS is Linux-based, and the vast majority of the Steam library runs on SteamOS, thanks to the Proton compatibility layer Valve ships (over 18,000 titles last we checked).