It's hero time on the go with Ben 10: Alien Force: Vilgax Attacks for the PSP. When Ben's most powerful nemesis, Vilgax, returns with a plan to conquer the universe, you must leap into action. Journey to multiple planets and battle a fearsome army of alien foes in this action-packed 3D adventure. For the first time, take control of ten of Ben's most popular alien forms, including Swampfire, Humungousaur, and Jet Ray, freely switching between them to solve puzzles and crush enemies. Unleash incredible powers and save the galaxy from the clutches of Vilgax in this ultimate Ben 10 experience.