Midnight Gunwatch is a single-player strategy game designed for Windows, immersing players in a zombie defense scenario set in a post-apocalyptic city. Players control a survivor tasked with manning one of four mounted guns to fend off waves of increasingly aggressive zombies. The gameplay revolves around managing resources, where players earn gold to upgrade their defenses and firepower, enhancing their chances of survival against relentless attacks. As players progress through the game, they face 29 finite waves, culminating in an endless wave that continues to escalate in difficulty.

The game features a unique mechanic of a shared barricade, which regenerates over time and requires strategic management to prevent the zombies from breaching the outpost. Players can upgrade their defenses across three paths with 20 levels each, including enhancements for gun damage and fortifications. With multiple zombie appearances and enemy types, Midnight Gunwatch offers a dynamic and engaging experience that challenges players to plan their strategies carefully while keeping the perimeter secure.