Hopefully you've already tried the Warhammer 40K: Space Marine demo by now -- and enjoyed it. If you haven't, we recommend doing so immediately, though should you require further convincing, we've got a little footage of the PC version on hard difficulty.
As previously mentioned, the demo features two portions of the campaign. First, you'll be defending a munitions factory against hordes of Greenskins (a not-so-affectionate nickname for Orks), armed to the teeth with everyone a Space Marine could need in a fight. The second part of the demo lets you try out the Jump Pack and rain death upon your enemies from the skies.
We're less than two weeks away from the release of the full game. Mark your calendars for September 6, when Space Marine arrives on Xbox 360, PS3, and PC.