Based on the 2007 film, Transformers: Decepticons invites players to step into the dark side and work their way through over 20 missions as members of the devilish Decepticons, the enemies of the Autobots. Gamers take the role of 30 different transforming characters and then work through each mission in an effort to wipe out the advantageous Autobots. Players will transform into jets, sports cars, and helicopters as they journey through the game. Players may challenge friends through a wireless connection to the "AllSpark War" where gamers can battle against those do-gooders who purchased Transformers: Autobots. Players may also challenge friends to rounds of Team Death Match and AllSpark Sports.