Check out these incredible Starcraft 2 mods!
METAL SLUG (Download)
http://www.youtube.com/watch?v=oAvZlonNTDg
ORIGINS (Released in 8 days)
http://www.youtube.com/watch?v=TWXtq8mkYg8
ZOMBIE DEFENSE (Release: TBA)
http://www.youtube.com/watch?v=Ah4HVmBpFvk
ASTEROIDS (Download)
http://www.youtube.com/watch?v=qz84U36WVBY
CHESS (Download)
http://www.youtube.com/watch?v=ly2vw6wyeHw
REAPER (Release: TBA)
http://www.youtube.com/watch?v=5sEORA5QDQc
FINAL FANTASY (Release: TBA)
http://www.youtube.com/watch?v=Vjuf7DELz9s
Also check out this video as well
THIRD PERSON SHOOTER (Pre-Alpha Stage)
http://www.youtube.com/watch?v=wQSpelnU31s
STEAK RACER (Download)
http://www.youtube.com/watch?v=tEMWi7NbEcs