Unofficial No Mob Farms
Unofficial Fabric port of No Mob Farms by orlouge for Minecraft 1.21.11.
This project is not affiliated with or maintained by the original author.
About this port
This port updates No Mob Farms for Minecraft 1.21.11 / Fabric while keeping the original gameplay behavior as close to upstream as possible.
The port is based on No Mob Farms 1.6.7 and contains compatibility changes required for Minecraft 1.21.11.
Source code for this port:
https://github.com/SpolzerMod/unofficial-no-mob-farms
Original CurseForge project:
https://www.curseforge.com/minecraft/mc-mods/no-mob-farms
Original source code:
https://github.com/orlouge/no-mob-farms
What does No Mob Farms do?
No Mob Farms is a server-side mod designed to reduce the effectiveness of automated mob farms without changing mob drops.
It includes countermeasures for:
- Natural mob farms, including zombies, skeletons, creepers, zombie piglins and endermen
- Mob spawner farms
- Structure-based farms such as guardian and wither skeleton farms
- Zombie reinforcement / copper farms
- Iron farms
- Raid farms
The mod attempts to detect repeated farming behavior and reduce spawn rates in affected areas while interfering as little as possible with normal gameplay.
Players killing mobs normally should generally not notice anything. In edge cases, mobs may temporarily take longer to spawn in an area.
Portal-based gold farms are not affected by this mod.
Configuration
Configuration is stored in:
nomobfarm.properties
Individual countermeasures can be adjusted or disabled.
Natural spawning
Natural mob spawning can be progressively slowed when mobs originating from the same area die repeatedly.
Main options:
natural_slowdown_rate=1000 natural_recovery_rate=0.0003 natural_max_wait=100000 natural_min_deaths=0 natural_max_deaths=-1 natural_offline_persistence=259200
Set:
natural_max_wait=0
to disable this countermeasure.
Mob spawners
Spawner blocks can be slowed after enough mobs produced by them are repeatedly killed.
Default settings:
spawner_slowdown_near_rate=20 spawner_slowdown_far_rate=100 spawner_recovery_rate=0.001 spawner_max_wait=10000 spawner_min_deaths=15 spawner_max_deaths=-1 spawner_offline_persistence=259200
Set:
spawner_max_wait=0
to disable the spawner countermeasure.
Zombie reinforcements
The mod can reduce repeated zombie reinforcement spawning:
reinforcement_penalty=0.049 reinforcement_penalty_conversion=true
This is particularly relevant to farms that rely on reinforcement mechanics.
Iron farms
Iron golem spawning can be affected by increasing how long villagers remember nearby golems:
golem_detection_memory=10000
Set it to 0 to disable this feature.
Raid farms
Raid farm countermeasures include randomized raid centers and a minimum village size requirement.
raid_center_min_randomization=16 raid_center_max_randomization=24 raid_min_size=512 raid_no_bad_omen_loop=true
Set both raid center randomization values to 0 to disable center randomization.
Set:
raid_min_size=0
to disable the minimum village-size requirement.
Set:
raid_no_bad_omen_loop=false
to disable the bad-omen-loop countermeasure.
Crop farms
Crop-farm countermeasures are not part of No Mob Farms anymore.
They were moved by the original author to:
Issues
Please report issues specific to the Minecraft 1.21.11 unofficial port here:
https://github.com/SpolzerMod/unofficial-no-mob-farms/issues
For information about the original mod, see the upstream project:
https://github.com/orlouge/no-mob-farms
Credits and license
No Mob Farms was created by orlouge.
This unofficial Minecraft 1.21.11 Fabric port is maintained by Spolzer.
The original project is distributed under the MIT License. This port retains the applicable copyright and license notices from the original project.

