'Metro Last Light' from publisher Deep Silver.
Deep Silver and 4A Games have released the dedicated Linux version of Metro: Last Light via Steam, and confirmed future support for Steam OS and the Steam Controller.
In fact, the 300 members of the Steam community chosen to receive prototype Steam Machines will find a copy of Metro: Last Light included with the hardware.
"We are excited by the prospect of bringing the ultimate Metro experience, powered by next-gen PC hardware into the living room," said Oles Shishkovstov, Chief Technical Officer at 4A Games. "Metro: Last Light will be a great showcase for Steam OS and the Steam Controller."
Metro: Last Light already supports Steam Play, meaning that owners of any Steam version will automatically find the game added to their Windows PC, Mac, and Linux Steam libraries.