Zombieium
by wearedevhtml
Zombieium turns Minecraft nights into a zombie survival experience on Fabric, with waves that spawn around players after dark.
What it does
After dusk, zombies appear in groups around each player at configurable distances, in a set number per cycle and at a set interval. A nearby cap limits how many can gather around one player at a time, which keeps the swarms from growing without end. Creative players and spectators are skipped, and the Overworld hostile-mob roster can optionally be reduced to zombies only.
An optional boss encounter begins after midnight, when a red beam marks a player and a warning appears. The boss arrives with a fiery entrance, a boss bar and boosted stats, and it drops unique items. The mod also offers a night zombie spawner and debug output that logs spawn failures to chat and logs.
Fabric API is required. Mod Menu is optional and adds a configuration screen on the client. The mod runs on client and server, so both sides need it. It is published only for Fabric 1.21.11, with 1.0.0 as the latest file, and is released under a custom license that is not open source.
Key features
Night zombie waves
Vanilla zombies spawn around players during the night, with configurable spawn distance, interval and count per cycle.
Optional boss encounter
A boss event can start after midnight, with a red beam warning, a boss bar and a dramatic arrival effect.
Spawn limits
A nearby cap of 16 zombies per player is the default, and creative players and spectators are excluded from spawns.
Configurable targeting
The zombie-only hostile roster and the target filters can be turned on or off in the config file.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 1
Use cases
Survival servers
Server owners who want harder nights can tune the waves and boss chance without changing other mobs.
Single-player survival
Players on a local world can use the default timings or adjust the spawn distances in the config.
Who it’s for: Server owners and players who want longer, more dangerous nights built around zombies. Both the server and players need the mod, and Mod Menu is only needed for the in-game config screen.
How it compares
ZApocalypse is server-side only and uses the MIT License for Fabric 1.21.1, so players can join without installing it. Zombie Survival Mod (ZSM) is client and server, open source under the MIT License, and built for 1.21.1 – 1.21.4, so it targets an earlier range than Zombieium. Burvy's Zombies is server-side only for 1.21.11 under Creative Commons Attribution 4.0 and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Zombieium | Fabric | 1.21.11 | Client and server | 2026-04-24 |
| ZApocalypse | Fabric | 1.21.1 | Server-side only | 2026-03-12 |
| Zombie Survival Mod (ZSM) | Fabric | 1.21.1 – 1.21.4 | Client and server | 2025-11-15 |
| Burvy's Zombies | Fabric | 1.21.11 | Server-side only | 2026-04-06 |
Questions
Does Zombieium need Fabric API?
Do players need to install Zombieium?
Can the boss encounter be turned off?
In the catalog
Zombieium is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
Zombieium turns Minecraft nights into a focused zombie survival experience. While enabled, the mod: - Spawns vanilla Zombies around players at night (configurable distance, interval, amount, and nearby cap) - (Optionally) keeps the Overworld hostile-mob roster “zombie-only” by removing other hostile mobs as they load…
Official listing
- Modrinth page
- modrinth.com/mod/zombieium
- Owner
- wearedevhtml
- Published
- 2026-04-24
- Updated on Modrinth
- 2026-04-24
- Facts verified
- 2026-10-15