As of 2015, some popular "Ben 10" games include "Galactic Monster Collection" and "The Alien Device." Both of these games are available to play for free at the Cartoon Network website, CartoonNetwork.com.
"Galactic Monster Collection" offers a player the chance to play five levels as either Snare-Oh or Blitzwolfer. In this game, the player must overcome certain obstacles and complete a goal before moving on to the next level. The player uses the computer's keys to move forward and jump to the top of obstacles.
In "The Alien Device," Ben needs to protect a recently discovered alien artifact from Danny, after Danny's escape from the Null galvanizes him to action. This game features multi-level gameplay and different worlds to explore.