Strap on the Omnitrix, because it's time for you to help Ben, Gwen, and Grandpa Max retrieve the ultimate weapon in The Mystery of the Mayan Sword! The Forever Knights are on a mission to uncover the El Chuah Sword, the most dangerous weapon on the planet! Now you've got to help Ben, Gwen, and Grandpa Max stop them from reaching it! Search for clues, solve puzzles, and explore four epic levels as you prevent the Forever Knights from attaining this weapon of mass destruction! Along the way you'll be transforming into your favorite aliens like Grey Matter, Stinkfly, and Four Arms! Play Ben 10 games and tons of other free games on Cartoon Network!