Unknown is the main antagonist of Transformers: The Game (Autobot/Decepticon) and Transformers Revenge of the Fallen: Autobots/Decepticons. Unknown is a rookie in the Decepticon army sent to Earth in search of the All Spark. Under the tutelage of senior soldiers like Barricade and Starscream, this new warrior can assume a wide variety of Alternate mode alternate modes scanned from the Human local life-forms' vehicles in his fight against the Autobots.