Ethan Cole confronting Super Theta inside the UFO.

The Super Theta is a variant of the Theta which does not retain "The Theta" ability to order the mutant Leapers to attack any human (like Ethan) lucky enough to manage to get through hordes of mutants and The Theta as well as aliens. This mutant also unleashes evil parasites which breed like bunnies and can really mess up the players circle strafing so eliminate them first, unless you like pain and confusion, when the parasites jump away and become hard to find.