There is a certain group of gamers who care about all of those games, but there is a not insignificant group who doesn't at all. So while it's not a non issue, it's not a show stopper that you can't play online shooter games. And that really is the only genre of game that won't work. Everything else has been flawless on linux.

There's no game worth installing a rootkit for. The market is far more diverse and interesting than the handful of popular AAA titles , most of which are just shooters