After becoming injected with a formula derived from an alien ship, a lab gorilla escapes from his containment and befriends two young boys. The alien formula causes the gorilla to grow to gargantuan size and rampage throughout the city and the boys must find a way to save their simian friend before the army takes him down.

A group of cold-blooded cannibals keep people in cages until they're ready to be butchered. One of the captives escapes, but dies in the surrounding forest. Nature soon takes a hand, reviving the former captive and turning him into a marauding beast.

A greedy developer disturbs sacred land, unleashing ghostly dinosaurs that terrorize a neighborhood as residents face a prehistoric curse.