Decay is a first-person co-op zombie survival shooter that runs entirely in your browser. The setting is a fog-choked wilderness regenerated from a new seed every room: two square kilometers of dead trees, rocks, and bad sightlines, with nowhere to hide and no way out. The horde never stops coming. Four breeds of the infected hunt you: shambling walkers, hulking brutes, lean skinnies, and runners that close distance terrifyingly fast. Your answer is an M16A2, a minimap radar, and whatever medkits and armor the world coughs up. Play solo and see how long you last, or share the room link and hold the line as a squad. Teammates appear as color-marked survivors with health bars, the horde splits its attention across everyone alive, and when you fall in co-op you respawn beside a living ally instead of watching from the menu. There is no final wave and no rescue. Just the kill counter climbing and a Top Survivors leaderboard waiting for your name. Built with Three.js, played with a mouse, remembered in kills.
How to play Decay — Co-op Multiplayer Zombie Survival Shooter
Objective: survive as long as you can and rack up kills. There is no win screen. The run ends when the decay takes you.
Controls (desktop, keyboard and mouse):
- Move: WASD. Sprint: Shift. Jump: Space. Crouch: C
- Shoot: Left Mouse. Aim down sights: Right Mouse
- Reload: R. Show controls: P. Release the mouse: Esc
Combat tips that actually matter:
- Your M16A2 holds 30 rounds. Reload before empty and you keep one chambered for a 31st.
- Bullet spread is real. Crouching or aiming down sights tightens it. Sprinting, jumping, and strafing bloom it wide.
- Each hit deals 50 damage, and the tougher variants soak up to 600. Watch the fast ones: runners and skinnies close before the brutes do.
- Armor absorbs damage before health. When you hear ARMOR BROKEN, disengage.
- Red glow means medkit, blue glow means armor. Drops despawn, so detour early.
- Watch the minimap: green is you, red is the horde, team colors are your squad.
Co-op:
- Open the room link on any device to join the same world. Everyone shares the map seed, so the forest is identical for all.
- Death in a squad means respawning near a living teammate. If everyone drops, start fresh.
- Enemies spawn around every living player, so spreading out spreads the pressure.
Kills are submitted when you fall. The Top Survivors board keeps the score honest.
This is the public world for Decay — Co-op Multiplayer Zombie Survival Shooter — one permanent room anyone on the internet can join. Open the page and you're in, live, with whoever's online. Free in your browser; no download, no sign-up.
