there are NO games for Ubuntu Linux, due to them not being supported.
only way to run Window's games on Linux is thru program called 'Wine'.
he has claimed to found a game for Linux. (i call bullshit.)
The performance may be okey if you run your system with a quad-core and a gfx card e.g. from the GTX 400 row, and still the games will look like rubbish... i meant new games, that look badass :P
But well, at least some games work on Ubuntu. Not that i care, but faszinating.