Ben 10 Alien Force - Nintendo DS Five playable alien forms include Swampfire, Big Chill, Humongousaur, Jet Ray, and Spidermonkey Fluidly link your attacks to unleash devastating combos Fast paced side scrolling actions gameplay with mix of puzzle and platform Original story based on characters and events in the first season of Ben 10 Alien Force Play as alternate alien forms including Goop, Chromastone, and Echo Echo