10 Most Powerful Sci-Fi Movie Villains

10. Alien Queen - Aliens

After one Xenomorph proved to be a formidable threat to the crew of the Nostromo in the first Alien film, James Cameron upped the ante on both sides in Aliens as the Colonial Marines faced off against a horde of aliens spawned by the gigantic Alien Queen.

A huge and imposing creature, for the majority of the film the Alien Queen remains out of sight, laying countless eggs to add to her brood of murderous offspring. After Ripley torches those very same eggs, the Queen goes on a rampage as her maternal instincts kick in.

Stronger and more deadly than any Xenomorph previously faced, it is clear that even the well-trained marines would be ill-equipped to take on such a foe. In the end, Ripley has to work a mech-suit to overpower the terrorising threat and expel her into to space.

Xenomorphs have never been as physically dominant, or seemingly intelligent, before or since.