Zombie Realm

Zombies rush your backyard and you start with whatever you can hold—a shotgun and a vest—surviving the first waves by shooting fast and staying sharp, then turning every cleared wave into coins that instantly power upgrades, swapping into SMGs and assault rifles for heavier firepower and adding skills like freeze or poison gas to control and wipe crowds, and as the hordes grow you keep snowballing harder until you’re no longer just defending a fence—you’re hunting zombies like a pro, which feels ridiculously satisfying.