Retro run-and-gun fun with Contra: Evolution (pictures)

With its updated graphics and touch-based gameplay, Contra: Evolution should have fans of the original console version of the game excited.

All of the stages from the classic NES game have been recreated for mobile devices. Here's one of the 3D levels, which should look familiar to fans of the original.

Contra: Evolution is pretty light on explanations. And unfortunately, those that it does provide are not very helpful. With that in mind, the best way to get started is to jump right into the game.

One thing that's new to the mobile version of the game is the ability to pick your character. To start, you get two choices, but as you make your way through the game, you'll be able to unlock another two.

One of the unlockable characters, Ricci, wields two pistols and a unique arsenal of attacks.

Mission Mode lets you play individual levels for practice.

The system of extra "bullets" and other special items can be confusing, since the game doesn't effectively explain how it works.