Once you have installed the required app, all you need to do is load it into the emulator and play the game. A nice little emulation of the gameīen 10 - Protector of Earth is delivered as an NDS file which you have to use with an emulator, preferably DeSmuME. The game takes you on a series of adventures in which you will be facing robots, aliens and ultimately Vilgax which of course, you defeat. Ben 10 - Protector of Earth is a game based on the popular animated series in which you get to take control of Ben and all his alien buddies.