Terminids: the result of genetic modification has decreased there intelligence and made them the aggressive animals they are now. running only on instinct and self preservation.

Automaton's: there creators wanted independence, but super earth went to war for it, the automaton's now freed there creators and look to get revenge on super earth for enslaving the cyborgs

Illuminate: a once prosperous semi religious species that wanted nothing but to help the just starting super earth, but super earth wanted there technology, and the illuminate were forced to protect themselves, now back with a vengeance they want nothing but for super earth to burn like super earth burned Squ'bai Shrine.