Ridley Scott's sci-fi horror classic stars Sigourney Weaver as Ripley, a tough-as-nails warrant officer who stares down one of the most terrifying movie monsters of all time: a bloodthirsty alien that stalks and eviscerates its prey. As the deadly creature winds its way through the air shafts of the spacecraft Nostramo, the crew members consider deploying the ship's escape shuttle … but there's only room for four people.

Two real-life governors -- Arnold Schwarzenegger (Dutch) and Jesse Ventura (Sgt. Blain) -- use their muscled intellects to pursue a force more sinister than state budget crises: an otherworldly creature deep in the jungle. Adept at slaughtering well-trained fighters, the beast is practically invisible. Special effects, dizzying camera work and a sci-fi bent elevate John McTiernan's gory horror-actioner, which spawned several sequels.

When aliens land on Earth, global business conglomerate Multi-National United forces them into rigid containment zones where they are compelled to labor, even as MNU commandeers their otherworldly technology for profit. As tensions build between human and non-human races, a rogue agent leads a resistance movement against MNU's ruthless consolidation of power. Neill Blomkamp directs this cinema verité-style sci-fi thriller nominated for a Best Picture Academy Award.