Overrun: Offline Tower Defense

Overrun is a zombie base defense game where you not only build turrets and barricades but also take direct control of a survivor to shoot the horde yourself with twin-stick controls. It plays fully offline, so you never need a connection to enjoy the action.

Every zombie you kill earns Z-Bucks, which you spend on upgrades between waves. With dozens of waves, each one pushes harder than the last, challenging your strategy and reflexes. The maps include the suburbs, a hospital, and a power plant, each with its own layout and tougher enemies, so a tower defense plan that worked in the suburbs needs rethinking at the power plant.

Zombie base defense starts with the base: the turrets, barricades, and defensive structures you place and upgrade. Your survivors carry rocket launchers, .50 cal rifles, grenades, and Molotovs, and they level up as they fight. In the middle of a wave, you can call in special strikes, drop first-aid kits, and pick up power-ups.

This is tower defense and twin-stick shooting in one game, and both work offline. Leaderboards and achievements run through Google Play Games, cloud saves keep your progress safe between devices, and there are daily rewards to collect. Overrun is free to play, with optional in-app purchases.