Brighton is in ruins after the alien invasion. The city is destroyed and the people are in a panic. Ben Tennyson, a 14-year-old boy who has the power of the Omnitrix, a device that allows him to transform into different alien creatures, must find a way to save his hometown.
The gameplay for Ben 10: Ultimate Alien Cosmic Destruction is fast-paced and action-packed. Players control Ben as he battles against an army of aliens who are threatening the city. The game features a mix of combat and exploration, with players able to transform into different alien creatures to take on enemies and solve puzzles.
The gameplay is divided into two main modes: story mode and arcade mode. In story mode, players follow Ben as he tries to save Brighton from the alien invasion. In arcade mode, players can choose their favorite alien characters and compete in time trials or challenge friends to a fight.