A free app for Android, by TNSoftware.
Stick Fight 2 is the best 2D fighting game in the Google Play store. It has characters to choose from, with each having its own special abilities and style of fighting. The game has more than 20 different weapons to choose from, and each weapon has its own special effect.
You will play as the chosen stickman, and you will have to defeat all of the other players in the arena. You will be able to unlock new weapons and abilities as you defeat other players.