Ben 10 Alien Force follows Ben five years after he put away the Omnitrix. Grandpa Max has gone missing and it’s up to Ben to find him. Gameplay allows the player to control either Ben, his cousin Gwen, or former enemy Kevin as they fight through levels to find Max. Ben can transform into five new aliens, including Swampfire, Jet Ray, Humungousaur, Spidermonkey, and Big Chill, while Gwen can create energy shields and Kevin can absorb different materials. Combat is in the basic Beat ‘em up style, with all the enemies needing to be defeated before the player can advance. The DS release includes three exclusive alien forms for Ben: Echo Echo, Goop, and Chromastone.