You're a Cybertronian, a robot humanoid, from Cybertron, a mechanical planet. You got caught in the war between the Autobots and the Decepticons, causing you to nearly die.

You were put in a pile of robotic corpses before getting sent to outer space.

When you woke up from near-death, Unicron the Planet Eater, in his planet-form, flew towards your weak body

His size is immeasurable, and his voice booming.

"Hello. I trust you know of me, Cybertronian?"