OnlyZombies
by R7X2
OnlyZombies turns a world into a zombie-focused survival experience by removing most non-zombie mobs through a togglable game rule.
What it does
A game rule named in the mod disables the spawning of most entities other than zombies, so zombies become the main threat in a world. The rule can be switched on or off, which lets a world keep ordinary mob spawns or run the zombie-only setup. Named mobs such as the Cave Spider and Elder Guardian are among those the rule filters out when it is enabled.
The mod suits survival worlds and servers that want a narrower set of threats than vanilla spawning allows. Because the filtering is a game rule, server owners can change it per world without editing mob data. OnlyZombies is published for Forge and NeoForge across 10 release versions, 1.17.1 – 1.21.8, and is released under the MIT License, though it is not open source. Every player and the server need a copy of the mod.
Key features
Togglable game rule
A world-level rule decides whether the zombie-only filter is active, and it can be turned on or off at any time.
Non-zombie mobs removed
When the rule is enabled, most entities other than zombies stop spawning, leaving zombies as the dominant hostile mob.
Named exceptions
Mobs such as the Cave Spider and Elder Guardian are among those the filter covers, so their spawns are affected too.
Zombie-focused survival
The filtering produces a survival setup in which the zombie is the main threat across the world.
Compatibility
Latest build for each game version and loader.
1.21.x3 of 3 versions with builds
1.20.x3 of 3 versions with builds
1.19.x2 of 2 versions with builds
1.18.x1 of 1 version with builds
1.17.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Zombie survival worlds
Players who want a single enemy type to shape their survival run can enable the rule in a single-player world.
Multiplayer servers
Server owners can set the rule for a shared world so every player faces the same zombie-focused spawns.
Who it’s for: Survival players who want a narrower set of hostile mobs, and server owners who set spawn rules for a shared world.
How it compares
No Elder Guardian ❌ is a Fabric, Forge, NeoForge and Quilt mod for 1.13 – 1.21.11, server required with client optional, and it is not open source. Zombie Take Over covers Forge and NeoForge for 1.20.1 – 1.21.5 and is server-side only. Elderly Guardians is server-side only, open source under the MIT License, and published for 1.20.1 – 1.21.4 on all four loaders.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| OnlyZombies | Forge and NeoForge | 1.17.1 – 1.21.8 | Client and server | 2026-07-15 |
| No Elder Guardian ❌ | Fabric, Forge, NeoForge and Quilt | 1.13 – 1.21.11 | Server required, client optional | 2025-11-27 |
| Zombie Take Over | Forge and NeoForge | 1.20.1 – 1.21.5 | Server-side only | 2025-05-27 |
| Elderly Guardians | Fabric, Forge, NeoForge and Quilt | 1.20.1 – 1.21.4 | Server-side only | 2025-04-28 |
Questions
Does OnlyZombies need to be installed on both sides?
Which loaders does OnlyZombies support?
Can the zombie-only filter be turned off?
In the catalog
OnlyZombies is one of 11,058 Mobs mods on ModsFinder, and one of 6,527 Mobs mods for Forge. 17,695 mods support Minecraft 1.21.8.
More from R7X2
Similar mods
What the author says
Only Zombies is a mod that removes many non-zombie mobs to create a zombie-focused survival experience. This makes zombies the main threat in the world.
Official listing
- Modrinth page
- modrinth.com/mod/onlyzombies
- Owner
- R7X2
- Published
- 2026-07-15
- Updated on Modrinth
- 2026-07-15
- Facts verified
- 2026-10-15