Bloody Zombie Slayer 2 (Top-down shooter 1-4 PLAYERS)

Description

You are looking for survivors in a high building. You hear the zombies coming to the building and you are forced to run to the roof. When you look down you see tons of zombies going into the building to eat your flesh... -----fight your way to freedom as you battle 21 waves of zombies! Now with a WAVE-SYSTEM and you can buy weapons like a shotgun! Thanks to @solidninja2020 for the logic!-----