Skeletons turn into cyborgs in space

Sean Barker became the unwilling host to an alien bio-armor known as the Guyver. A year ago he destroyed the Kronos Corporation, an organization of mutants who want the Guyver. Now he is trying to find why the Guyver unit forces him to fight and kill evil.

Sho and his friend Tetsurou stumble upon an odd alien artifact while walking through the woods. Then, the alien artifact breaks free of its metallic bonds and enters Sho's body, turning him into the Guyver. With this new power, Sho must do battle with the evil Chronos corporation and their genetically enhanced Zoanoids, who seek to get the Guyver back into their labs. No one close to Sho is safe from Chronos. He must fight.

The Guyver: Bio-Booster Armor is a 12 part anime OVA loosely based on Yoshiki Takaya's manga, Bio-Booster Armor Guyver. It was released in Japan from 1989 to 1992. It is the second animated adaptation, following the 1986 OVA Guyver: Out of Control.

The evil Dharsa Corporation creates advanced Human Clone Robots identical to humans and sells them as slaves to modern society. They are stronger, faster and smarter than humans. They declare war on humankind. One hundred years after this apocalypse, a group of 10 people are enhanced with robot parts and special powers to save humankind. The Cyborgs are born.

Alien creatures invade human bodies and turn them into cybernetic fighting machines.

A U.S. Marine special ops team awakens from hypersleep in a long-abandoned underground laboratory complex with no memory of who they are or why they are there - and they are not alone. Something has infiltrated the complex.

An alien race sends cyborgs — made to look like the son of a famous scientist, whom they killed when he landed on their planet — to Earth to help pave the way for an invasion.

A mad scientist implants an electronic device into the brain of an injured soldier, which turns him into a psychotic killer.