HL2 isn't beta any more. But yeah, I'd buy more Valve games if I didn't already own them. I played through Portal again (with the open source Radeon driver), and have been playing HL2 now and then, but I usually end up booting to Windows for gaming, just because I'd rather play Bioshock Infinite or whatever. The next big Linux game coming up seems to be Football Manager 2014, but that's just a glorified spreadsheet. I remember playing it under Wine when it was Championship Manager 10 years ago, and it actually ran faster than under Windows.