In order to make an environment more hazardous, creators of fiction will often include aggressive predatory beasts that occur in far larger numbers than should be possible given the environmental conditions shown. In Real Life, the larger a creature is, the more energy in the form of food from a suitable source it must consume in order to both grow so large in the first place and to sustain itself on a daily basis. If it is very active it will need even more calories just to survive. Despite this, there will often be a veritable horde of wild, aggressive beasts that roam a desolate wasteland or almost lifeless underground tunnels without having prey to feed on and without attacking each other. Such beasts will often be absurdly persistent when encountering humans, attacking them seemingly