Otrebors are the main technicians that work to convert Delta Base into an alien-inhabitable environment. They generally are to be found traveling alone, but this should indicate to a foe that they can more than handle themselves in battle. In fact, they pack quite a punch and can be very deadly to Humans. They appear to be a sadistic species, and can often be heard chuckling in a way that Humans often describe as an "evil laugh"; however, one will more often hear and feel their blaster fire first. It is advised to approach Otrebors from a distance, although a quick burst from an M-343 or an alien weapon will bring them down quickly from any range.