It is perhaps a sign of advancement of Linux as a platform that people are starting to seriously ask the question: "Where are the Linux gamers?" Just recently, I've seen Mad Penguin ask it, followed by this indie-game developer's blog. The question also got batted around on Slashdot.
Of course, we enter into the discussion with the assumption already established that there are fewer Linux users, and that game companies mostly take no notice of Linux except to burn it in effigy. Duh, we know. Even if you adjust for that, there's a lower percentage of Linux gamers. Onward:
First, my own experiences: