Warhammer 40k: Space Marine gets a demo and here's the trailer for it.

Relic Games is releasing a demo for their upcoming Warhammer 40k: Space Marine. The game follows Captain Titus as he battles to protect the Empire. It’s a third-person shooter and melee game. It won’t feature a cover system but health does regenerate and your armor comes with an Iron Halo shield. Two multiplayer modes will be available. 

The demo is available today August 24th for both the Xbox 360 and Playstation 3. The full game will be released on September 6th, 2011 for PC, Xbox 360 and Playstation 3.