10 Most Fearsome Alien Races In Star Trek

10. Hirogens

A species whose entire existence and civilisation was built around the practise of hunting, the Hirogens were one of the most purely violent aliens ever featured in the Star Trek universe. They weren’t the most violent creature ever to appear, but their sheer lust for the chase makes them especially frightening.

The Hirogen had little respect and zero empathy for other species, treating them only as potential quarries for the next hunting expedition. They were no mindless killers, though: the ritualistic nature of their revered hunts required them to study their prey scientifically, ensuring the methodology of the kill was appropriately selected for the victim in question.

The unerring focus on hunting almost led to their downfall, as the Hirogens took to entertaining themselves with hologramatic simulations of potential victims. To up the challenge, the holograms were programmed to learn and adapt, eventually turning the tables on their erstwhile hunters.

The Hirogen were pushed back, but as a race they have what it takes to be a particular threat to the galaxy, with a proliferation of technology and weaponry, along with an innate bloodlust and understanding of hunting techniques.