Galactic Wars mod for Call of Duty 4 on PC. Great Fun.
Feel the force as you run around 4 different Star Wars themed maps. For anyone who has played CoD 4, this uses the same game, but has transformed it with Rebel or Imperial uniforms, laser weaponry, and call in air strikes with Star Wars fighter craft. Absolutely stunning peice of computer programming from a bunch of enthusiasts.
Only downside is this is a mod using custom maps. These should auto download to your PC, when the game is connected. But the downloads are large, some 250MB for the mods and initial map. You don't want to be on Virgin Media's STM when you go for that
Oh and it is available on one of the NTHW servers