Ben 10 Alien Force: Vilgax Attacks is the third game in the Ben 10 video game series, and the second game to be based on the Ben 10: Alien Force series. It was released on October 27, 2009. The game received generally positive reviews from critics
The story starts as Vilgax invades earth with a gigantic Null Void projector. The combined forces of the Null Void's prisoners and Vilgax's forces are too much for Ben, Kevin, and Gwen to handle. Ben proceeds to transform into Alien X but Paradox tells him not to use Alien X yet. And to make matters worse, some of Ben's alien forms become unacceptable after too many quick transformations after a fight with Psyphon. To help save the earth, Professor Paradox sends the trio back in time in order to stop Vilgax from collecting a power source for his Null Void projector. With help from Grandpa Max and Ship, Ben and company travel throughout the galaxy to foil Vilgax's evil plan before it can come to fruition.
In Ben's quest to thwart Vilgax, he will encounter enemies new and old, such as Psyphon, the Vreedle Brothers, Charmcaster, Darkstar, Ghostfreak (Zs'Skayr), Albedo, and D'Void (Dr. Animo), waiting to get their revenge on our hero. But Ben will also be among friends as Grandpa Max, Professor Paradox, Cooper, Ship, Grandma Verdona, and Azmuth help him to save the earth and the galaxy.