50. The Predator
Appears in: Predator (1987), Predator 2 (1990), Alien vs. Predator (2004), Aliens vs. Predator: Requiem (2007)
Scariest moment: The Predator fires a laser beam at George Dillon (Carl Weathers) that rips his arm clean off.
Weakness: Fighting former Mr. Universe champions.
Director John McTiernan's thoroughly badass Predator made all aliens presented as little green men look soft batch and laughably lame. The film's titular baddie is a technologically advanced extraterrestrial that resembles a diesel Rastafarian and uses laser weaponry and active camouflage invisibility to hunt special forces fighters (led by Arnold Schwarzenegger, in his prime) for sport in a Central American jungle.
Thanks to those inept Alien vs. Predator flicks, the character has been diluted in recent years, but as long as McTiernan's genre classic exists in DVD and Blu-ray forms, the Predator's once-sterling reputation won't ever completely fade away.