NE-β Type

The NE-β Type is a genetically engineered parasitic organism that appears in the non-canon Resident Evil video game Operation: Raccoon City.

Overview
The Nemesis Beta is a parasitic organism created by Umbrella which has the ability to control other B.O.W.s by gaining access to the central nervous system. B.O.W.s controlled by an NE-β are much more powerful and dangerous than un-controlled counterparts. The parasites themselves can also spray a kind of pheromone that zombies can easily detect. Targets covered in such pheromone are more likely to be attacked by zombies. The parasites have been shown to take control of host organisms by decapitating them and merging with the top of the spinal column.

In the Echo Six mission, Root of All Evil, a parasite attempted to latch onto a T-103. As it did so, the parasite seemed to partially melt into the Tyrant. Initial effects observed of this combination were a dramatic growth of the parasite's legs while the Tyrant's head remained intact. The infested Tyrant was encountered again in the mission Longest Yard. By this time, the parasite and the T-103 have more or less merged into one, with some of the parasite's characteristics flowing over those of the Tyrant. What was once the parasite's head now partially covered the T-103's exposed heart while the enlarged parasite legs were five times bigger than before, enabling the Tyrant to walk on them, dig underground or use them as weapons. In addition, the monster's left arm has become massively overgrown and clawed while its right arm looked skinny and stunted by comparison. The Tyrant also retained the parasite's ability to spray pheromones and can summon normal NE-β types by pounding its insectoid legs on the ground.

Despite the merge, the minds of the parasite and the T-103 remained independent of each other to some extent. For example, whenever the T-103 was unconscious, the parasite was able to continue fighting. Also, the exposed glowing membranes of the mutated parasite became new weakpoints for the Tyrant. The monster was finally killed when Dee-Ay shot its heart at close range with an automatic rifle and then jammed a grenade into a crevice next to its heart.