- Think about some game not too heavy for the box you own (even when you ran Windows);
- Look said game up on WineHQ's AppDB section;
- Pray it's rated Platinum (or at least Gold, for mercy);
- Torrent said game (unless you actually have a CD of it);
- Install said game and play it, only to find out a few side glitches that were not there with Windows;
I am pretty damn satisfied with Desktop Linux as it is at the moment - and gaming IS included in my satisfaction rating.
What... do you want more explanations? Well, I guess I do owe them in this case... It'll also help you to understand how to get the best Gaming experience in your Linux box.