An Orc Kruiser, in the Warhammer 40K universe, is a large Space Ship the Orcs use to invade other planets. The Forge Worlds are the worlds that Human Empire inhabit. It is known to be extremely difficult to rid a world of Orc infestation. In this game, an Orc Kruiser is heading towards on such Forge World and it is up to this small contingent of Space Marines to knock it off course