Cannon Defender is a free Android game developed by cranberrygame in the action game subcategory. The game's objective is to defend the castle from zombie attacks by using cannons. The game is set on a mountain surrounded by darkness, and players must be prepared for a horde of zombies that may come out at any moment.

Players must avoid or fight the zombies by touching the cannons quickly. There are four cannons- two up and two down- that players can use to shoot the zombies. The game's ultimate goal is to defend the castle from the zombie attacks and succeed in fighting them off with the cannons.

Cannon Defender also allows players to compare their scores with others in the global leaderboard. Overall, Cannon Defender is an exciting game with an easy-to-use interface that will appeal to anyone looking for a fun way to spend their free time.