Far Cry 3: Blood Dragon - While it is a stand alone expansion of far cry 3, it doesn't require the original game to play. Currently $5 on XBLA and $15 on psn. Awesome visual style, great soundtrack, and pretty funny. Not real long, but absolutely worth checking out.
Far Cry 3 Blood Dragon Intro
Far Cry 3: Blood Dragon (Soundtrack) 10 - Sloan's Assault