The Nerraw are a group of unclassified extraterrestrials that are found to roam the alien "levels" - areas "terraformed" by the Tenaj. Strangely, nothing at all is known about this species. Although Nerraws seem harmless enough, they are to be considered armed and extremely dangerous as they can kill even the toughest space marine in only a few seconds. Because of this, marines are advised to shoot first and make sure that they remain down for the count.