Half-Life Series

Unreal Tournament Series

Doom Series

Chaser

Star Wars Republic Commando

Aliens vs Predator 2

Contract J.A.C.K. (hated by many)

Prey

Turok Dinosaur Hunter

Duke Nukem 3D

;)

Here you have:

http://www.google.com/search?hl=en&q=JoyToKey%2Bdownload&btnG=Google+Search

JTK works with almost every single gamepad there is; and the best of all, it's freware and safe :)

Cheerz