Starscream was treated as an equal. he became a Autobot. He was in the Earth Battles and stayed on the Ark during the battle for Cybertron. He missed the days of being a Decepticon, so he left an joined them.
He stayed as a Decepticon. he tried to make Megatron proud, by winning fights, making a boomerang sword, and finding a partner Mini-con, Swindle. Megatron was never pleased. He is responsible for the death of Teletraan 1.
He was unhappy at the leadership of Deathasaurus. When he died, Starscream and Swindle joined Thrust's Predacons.