To help save the Earth, Professor Paradox sends the trio Ben Tennyson, Gwen Tennyson, and Kevin Levin back in time in order to stop Vilgax from collecting a power source for his Null Void projector. The story starts as Vilgax invades Earth with a gigantic Null Void projector. The first game was based on the first two seasons of series while Vilgax Attacks is based on the third and final season of the series. 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.