The Serpent Rises! Gather your team and prepare for battle! Cobra is on the move, and this time they're led by the sinister Serpentor.

You'll also face the unrelenting one-two punch of the twins Xamot and Tomax. But, hope is not lost! Youll be joined by the explosive firepower of Bazooka and Rock n Roll, as well as all new vehicles to add to your arsenal. This is an expansion. G.I. JOE Mission Critical is required to play. Features: Play as new Heroes Rock n Roll & Bazooka, Introduces a new boss Serpentor, 2 new lieutenants Tomax & Xamot, 2 new Vehicles.