A free app for Android, by Nitrome.

You will find yourself in the middle of a war between mankind and an unknown army that wants to take over the world. It’s your job to stop them. To do that, you will need to use various weapons, such as a gun, a grenade launcher, or an RPG. But first, you will need to make sure that you can handle all of them. But you will also need to be able to handle various other types of weapons, such as a sword or a pickaxe.

Climb the never-ending tower and prove your worth by taking on a wide variety of enemies, including powerful bosses. Evolve your skills and unlock special suits to gain unique abilities to help you progress further up the tower. With four themed zones and 25 suits to unlock, every run is a new challenge waiting to be conquered.