A free app for Android, by MANASTONE.

Compared to typical tower defense games, the Android app Zombie Defense is really unique. By accumulating block points in this game, you can enhance your tower and skills as well as create the most convenient path to the stage. You must also fight your way through seven areas in two separate game modes, easy or normal, and challenge mode. 

It includes five different tower types, more than 30 different varieties of terrifying zombies, and one ultimate tower. You must check the Tower’s capability as well as the zombie’s weak place in the game. Additionally, the game offers over 30 milestones and block awards.