Ben 10: Alien Force

Fifteen-year-old Ben Tennyson - otherwise known as Ben 10 - has already saved the world several times over thanks to the alien watch he found during a camping trip. The 'Omnitrix' permanently attaches itself to Ben's wrist and by turning the dial he can morph into various alien forms to fight bad guys.

As Ben has grown since the original series of the cartoon (and game), the Omnitrix has also adapted and given him new forms to try out. The potential is limitless if the full power of the watch is unlocked (over a million DNA samples according to the TV show), but right now Ben can only access a handful of forms at random, and only for ten minutes at a time.

Alien Force is the second series of the cartoon and sees Ben, cousin Gwen and former enemy turned comrade Kevin driving to a pier to investigate the disappearance of Ben's grandfather Max by the Highbreed aliens. Max is the leader of the Plumbers; a secret society who protect the earth from threats like the planned Highbreed invasion, so with him out of the picture Ben is left in charge.

The game plays out like the cartoon (each level is bookended by a cut scene) and you begin by controlling Ben on the pier, fighting your way through gangs of Forever Knights. You only have two alternate forms at first, courtesy of the Omnitrix: The Big Chill (a moth-like alien with freezing and flying abilities) and Swampfire (a tall, strong alien with fire abilities).