In Warhammer 40,000: Space Marine, you play as Captain Titus, a Space Marine of the Ultramarines chapter and a seasoned veteran of countless battles. A million strong Ork horde has invaded an Imperial Forge World, one of the planet-sized factories where the war machines for humanity’s never-ending battle for survival are created. Losing this planet is not an option, and be aware of the far more evil threat lurking large in the shadows of this world.
Note: This version of Warhammer 40,000: Space Marine is single-player only. Online multiplayer mode is not supported.
I’m just going by the description on the page. Maybe they just looked at the chainsword?