The PSP port of Transformers: The Game.
It has one campaign mixing new Autobot and Decepticons segments, after splitting from the shared starting point with the original game, featuring new playable character missions and going to more locations than the original.
It also has a multiplayer mode using the systems local multiplayer with more Decepticons playable and additional unlockable characters.

The Game features more than 20 playable TRANSFORMERS characters with three combat modes and 19 story-based missions that have players playing both AUTOBOTS and DECEPTICONS as they progress through the game. In addition, gamers can battle in four-player Ad Hoc wireless competitions including Deathmatch, Team Deathmatch, Ascension Rites (king of the hill) and Secure the Energon (capture the flag), in more than 10 multiplayer arenas.