link to another game MATURE GAME
I'm set up a game of Wushu using the 40k universe setting. Wushu is a 'fast-and-lite' rules-set, free, that allows the role-play to be front and centre of the game, rather than tons of rulebooks. I've trialed it out using the fantasy Setting from Exalted and found it works really well! The system itslef is included on the Game, under the thread 'System'.
Players take the parts of the Ordos Xenos Deathwatch Space Marines. They will be pitched against ancient evils that need more than bolters and brute strength to resolve. They'll be fighting planet-killing enemies with only their wits and faith to help them, at times. Think epic adventure rather than a wargame.