The latest massive set of Linux test data we have to share with Linux gamers and enthusiasts is a look at Counter-Strike: Global Offensive and Team Fortress 2 when using the very newest open-source Radeon graphics driver code. The very latest open-source Radeon driver code tested with these popular Valve Linux games were the Linux 3.18 Git kernel, Mesa 10.4-devel, LLVM 3.6 SVN, and xf86-video-ati 7.5.99. With this bleeding edge code there were sixteen AMD Radeon graphics cards tested from low to high-end and spanning several generations. Beyond looking at the frame-rate results, there's also power consumption, performance-per-Watt, GPU core temperature, and CPU usage to go along with all of these results.
Steam launched into beta for Linux on the 6th November 2012 and it's been one hell of a ride for Linux gamers since. This was the first time they let in a group of outsider gamers to test out the client.
Previously they put up a sign-up page where you could note your interest to test it and they were overwhelmed by the amount of people wanting to try it. In the first week they had more than 60,000 people sign up for the first Linux beta of Steam.