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. 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.

A nice little emulation of the game

Ben 10 - Protector of Earth is delivered as an NDS file which you have to use with an emulator, preferably DeSmuME. Once you have installed the required app, all you need to do is load it into the emulator and play the game.
The controls are easy to master and gameplay is very enjoyable if you’re willing to overlook the poor graphics of the game. Other than that and the fact that the HUD is unnecessarily big, the game seems to have no other meaningful downsides.

Drop combos and upgrade your alien forms

Ben 10 - Protector of Earth is an action platformer in which you will be fighting a lot of enemies in order to complete your mission. Ben can remain in each form for a limited amount of time but defeating foes replenishes some of your Omnitrix energy and allows you to keep going.
After every chapter in the story, you receive an amount of game points which you can then use to purchase upgrades. These can increase the time you can spend as an alien or even unlock new fighting moves.
A really nice feature that Ben 10 - Protector of Earth offers is the large number of combos you can perform during a fight. Each alien form has its own fighting style and abilities, and since you can purchase new ones, there are a lot of ways you can mix things up.

An entertaining little game

To sum things up, Ben 10 - Protector of Earth is rather modest when it comes to graphics and controls sometimes seem to be a bit slow but if you're a fan of the series, there’s a big chance you’ll like it.