Ammo runs out. Health doesn't come back. And the zombies only get faster. Undead Corridor is a 2D survival shooter that traps you in tight spaces — corridors, hospitals, barricaded rooms, city streets — and throws escalating waves of undead at you while your resources shrink with every trigger pull.

Six distinct game modes, a kick mechanic for point-blank emergencies, and a weapon upgrade system that resets on death give every run genuine stakes. It's a free browser game you can play right now on PLRun with no download.

Undead Corridor is a wave-based zombie survival shooter developed by ZapGames, released in October 2025 as an HTML5 browser game built on Unity WebGL. The core design is deliberately claustrophobic: you fight in narrow, confined 2D environments where retreat is limited and getting cornered usually means death.

Health never regenerates during a run, so every hit from a zombie is permanent damage you carry into the next wave. What sets this game apart from typical browser shooters is the resource tension. Ammo is limited, weapons are lost entirely on death, and the only thing that persists between runs is the money earned from kills.

That money buys upgraded weapons and ammo types before the next attempt, creating a roguelike loop where failed runs still contribute to long-term progress. With six game modes — each imposing different survival rules — the free online game offers significantly more variety than its minimalist 2D art style might suggest. It runs on desktop, mobile, and tablet browsers without installation.