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Re:Ubuntu now available from the Windows store by harrygeez on Wednesday July 12, 2017 @09:20AM (#14752243)
IIRC L4D does. Valve wrote a blog post about it
Re:Ubuntu now available from the Windows store by jhasse on Wednesday July 12, 2017 @09:31AM (#14752326)
The comparison was 270 FPS (Windows D3D) vs 315 FPS (Linux OpenGL). At those high framerates I don't think that any performance boost is relevant anymore. Furthermore Left 4 Dead is using D3D 9 IIRC, so pretty outdated.

http://blogs.valvesoftware.com/linux/faster-zombies/