Some say that Linux its not for games. Totally wrong.... What happens is due to Linux not being for the masses for the past years, gaming was in 2nd plane. But not anymore.
The creators from getdeb.net, made Playdeb, a repositorie only for games. The instalation of games is as easy as it could be. To install Playdeb, just follow their instructions http://www.playdeb.net/updates/#how_to_install, after that is just choose what game you want to play... Easy....
And afterall you will find very interresting games, such as:
World Of Padman - a 3d FPS
Neverball - 3d floor-tilting game
Urbanterror - FPS
Vdrift - Racing Simulation
So, as you can see games in Linux are now easy to install and easy to play.