Five awesome aliens have been unleashed from the darkest corner of the galaxy - and they're out to destroy the universe.
Only Cosmo, a young boy from planet Earth, has the power to stop them. Recruited by the elite defence organisation G-Watch to defend the galaxy, Cosmo must prove himself and commence battle against the deadliest aliens in space . . .
Cosmo's epic mission is nearly over - but now he must face the most terrifying invader of them all, the mighty Atomic. On the toxic planet of Abu, Cosmo and Nuri face many dangers on their search for Atomic - fighting their way through sinking mud, toxic swamps and radioactive beasts. Can Cosmo find the strength he needs to stop the evil Atomic, or could this final mission be his last . . .?