Call of Defense: Zombie War is an artillery guard war game available on iPhone. In this game, players are tasked with fighting off waves of demons that surround them. The objective is to build and upgrade turrets to defend against the monsters. By matching different types of turrets, players can create powerful combinations and enhance their defenses.

In addition to building turrets, players can also upgrade their skills to improve their combat effectiveness. The game offers popular playing methods such as tower defense, hang up, and synthesis. One of the notable features of Call of Defense: Zombie War is that it does not require players to spend real money on in-app purchases or wait for energy to regenerate. This makes it a great choice for players who want to enjoy the game without any restrictions on their gameplay time.

Overall, Call of Defense: Zombie War offers an engaging and challenging gameplay experience without the need for microtransactions or time restrictions. It is a great choice for players who enjoy tower defense games and are looking for a game to play in their spare time.