Going into more details, Windows games with no Linux version currently available can now be installed and run directly from the Linux Steam client, complete with native Steamworks and OpenVR support. DirectX 11 and 12 implementations are now based on Vulkan, resulting in improved game compatibility and reduced performance impact, and both fullscreen and gamepad support have been improved.
The initial set of supported games that Valve is enabling with this initial Beta release is the following one (Valve will enable more titles in the near future, however users can also try playing non-whitelisted games using an override switch in the Steam client):
Age of Chivalry - Age of Chivalry is a first person medieval online game being developed by Team Chivalry, you must own a copy of a source based game (HL2, TF2, DOD:S, CSS, L4D etc.) and have an active account on steam to play. The game itself is entirely free, so why not check us out on steam! (807 hits) System Shock on Steam - after two decades, Nightdive Studios is rebooting and re-imagining the original System Shock (720 hits)