While I'm not a linux fanboy, I would rather play games on linux then Microsoft. I've noticed a downward trend in the quality of DirectX and also with the upcomming version of Windows 8 being geared for touchscreen, I do not want to give Microsoft any more money for continued garbage and bloat. I'm failing to see what the hold up is if Valve has games available for Mac already but not for linux. Mac is based on BSD so whats the holdup Valve? Where's that juicy release of L4D2 that you already ported and even commented on the FPS difference?