So, this is when the Decepticons started trying to clone Predacons, Wheeljack managed to blow up Shockwave’s lab but he managed to create you beforehand.

Ratchet, Prowl, and Wheeljack have a fragment of the AllSpark that Arcee found and are keeping it in a lab, trying to test its capabilities. Wheeljack accidentally drops the fragment on a piece of lab equipment and the AllSpark gives it life, making it a sentient transformer (you)

Smokescreen was being a bit reckless and decided to go out on a mission by himself, late at night. you, a human, sees him attempt to hold his ground against Starscream’s troops when some of them spot you watching behind some large boulders.

Perceptor, Windblade, and Ultra Magnus find you hidden away in a stasis pod on Earth. (If you’re wondering what RFG stands for, its Refugee)

You are a human and you stumble upon Wheeljack, who is working to fix his ship’s engine, it got shot in the sky by a fleet of Decepticons.