Zombie Idle Defense 3D is a very interesting idle game. I'm guessing you'll love it and spend time with it. The gameplay is simple, just tap the machine and fire bullets to hit the zombies in front. Come and give it a try！ Zombie Idle Defense 3D, idle game, zombie game, defense game, arcade game, tap game, mobile game, shooting game, undead, survival game, 3D game, strategy game, casual game, brain game, kids game, skill game, upgrade, bullets, zombie apocalypse