There seems to be an ongoing theme in the trailers coming out of E3 today. They're rated "M," and proud of it. Some gory games are due out in the year ahead. This new trailer for Warhammer 40,000: Space Marine is no exception. Watch Captain Titus slice and dice some orks with friends. If you look closely you may even see some Chaos critters. I'm kidding, you don't have to look that hard. They're near the end, looking all Chaosy. WH40k: Space Marine will be out on September 6 for the PC, Xbox 360, and PlayStation 3. It supports 4 player online co-op.