The Joes get a visit from an unexpected ally, Bumblebee, who warns that their arch-enemy Cobra has teamed up with their enemy, the Decepticons, and that what they're planning will not bode well for planet Earth or the people who call it home. The forces of Cobra have new allies in their schemes to take over the world! Alien robots have landed on Earth and it is up to G.I. Joe to figure out if they're friend or foe! In this expansion, the Joe's will have to team up with the Autobots and investigate the Cobra/Decepticon plot. Take advantage of the Autobots' different modes to ride into missions or introduce some cybernetic muscle to your teams! This is an expansion, G.I. Joe Deck-Building Game is necessary to play.