THQ Inc. has announced that Relic Entertainment  will be releasing a playable demo for the upcoming 3rd Person Action/Shooter, Warhammer® 40,000®: Space Marine®  on Xbox Live®, PlayStation® Network and Windows PC. The demo is planned to launch simultaneously for the Xbox 360® and Windows PC on 23rd August and then on PlayStation®3 on 24th August. 
Players who have pre-ordered the digital PC version of Space Marine through Steam will receive an exclusive early access period starting on the 18th of August, running through the weekend. Steam will also be running a Warhammer 40,000 bundle sale at a very special rate during the same period. Check out STEAM for more details.
The Space Marine demo features two very different areas of the game. The first pits the player against an Ork horde outside the gates of a munitions factory. Armed with six devastating weapons, including the iconic bolter and lethal chainsword, the player will get to experience Space Marine’s seamless mix of melee and ranged combat first hand as they take on the rampaging invaders. The second area gives players a taste of the exhilarating Jump Pack sequences where the game’s hero—Captain Titus—takes to the skies to rain death from above.
Space Marine ‘Honour Guard’ community members will also get the chance to play the demo early on August 22nd, 24 hours prior to the public launch. For more information on how to sign up to get the demo visit the Space Marine site  and make sure you have registered with the Honour Guard.