ModsFinder

Configurable Zombie AI

by oggvik

Configurable Zombie AI changes how vanilla zombies detect, acquire, keep and switch their targets, and server operators adjust those rules at runtime.

FabricForgeNeoForgeBTA BabricClient and serverGNU Affero General Public License v3.0 or laterOpen sourceb1.7.3 – 26.2

What it does

The mod replaces the vanilla pick-nearest-valid-target behavior with a configurable target acquisition system. Zombies can be set to ignore line-of-sight checks, change their follow range, and optionally re-roll a target inside the same target family over time using weighted rules. Configuration is saved alongside each world, so changes reach zombies that are already loaded at once and no server restart is needed.

The mod keeps vanilla target families intact: zombies still select only the entity kinds vanilla allows, and only the selection logic inside those families becomes configurable. It also works with zombie villagers, Pure Titans SNC and datapack zombies. A second option prevents natural despawning. Admins control everything through commands that need permission level 2, and the root command can be shortened to czai.

The mod is written in Kotlin and requires Fabric Language Kotlin on Fabric, Kotlin for Forge on Forge, and YetAnotherConfigLib (YACL) on every loader. The server and every player need the mod installed. Files cover 10 release versions b1.7.3 – 26.2, with snapshot builds published, under the GNU Affero General Public License v3.0 or later, and the code is open source.

Key features

  1. Configurable target acquisition

    Server operators can alter the way zombies sense, pick, hold onto and swap their targets, in place of the one built-in vanilla routine.

  2. Line-of-sight and follow range

    Zombies can optionally ignore line-of-sight checks, and their follow range can be set to a configured value.

  3. Periodic target re-rolls

    If the option is on, zombies periodically draw a fresh target from the same target family, weighting the choices by configurable rules.

  4. Global kill command

    An admin command kills zombies globally or within a given radius, with a simple syntax.

  5. Despawn control

    An optional setting stops zombies from despawning naturally, so they remain in the world.

Compatibility

Latest build for each game version and loader.

26.x4 of 4 versions with builds
26.20.2.1_1+26.2-fabricNot available0.2.1+26.2-neoforge
26.1.20.2.1_1+26.1.2-fabricNot available0.2.1+26.1.2-neoforge
26.1.10.2.1_1+26.1.2-fabricNot availableNot available
26.10.2.1_1+26.1.2-fabricNot availableNot available
1.21.x3 of 3 versions with builds
1.21.110.2.1_1+1.21.11-fabricNot available0.2.1+1.21.11-neoforge
1.21.10.2.1_1+1.21.1-fabricNot available0.2.1+1.21.1-neoforge
1.210.2.1_1+1.21.1-fabricNot availableNot available
1.20.x1 of 1 version with builds
1.20.10.2.1_1+1.20.1-fabric0.2.1+1.20.1-forgeNot available
1.16.x1 of 1 version with builds
1.16.5Not available0.2.1+1.16.5-forgeNot available
ReleaseBetaAlphaNot available

This mod also publishes snapshot builds. Snapshots are not shown in the matrix.

Requirements

Dependencies declared by the latest file for each loader.

Required 2

YetAnotherConfigLib (YACL)A builder-based configuration library for Minecraft!
Required
Fabric Language KotlinThis is a mod that enables usage of the Kotlin programming language for Fabric mods.
Required

Incompatible 2

Zombies Apocalyptic AIA Minecraft Forge mod that transforms zombies into a relentless, shifting horde. They ignore line-of-sight, allowing them to track victims through walls, and dynamically switch between targets to create a more chaotic and overwhelming experience.
Incompatible
Zombies Ignore LOSA basic Minecraft Forge mod written in Java that makes it so zombies ignore line-of-sight. Meaning they can target players even if there is a wall in-between blocking their view.
Incompatible

How it compares

Full comparison

Slow Baby Zombie also works on Fabric, Forge, NeoForge and Quilt for 1.20.1 – 26.1.2, but it is client and server with all rights reserved, so it is not open source. Only Zombies Spawn is server-side only, open source under the MIT License, and covers 1.18.2 – 26.2, so players need nothing installed. Revert Zombie Reinforcement is also server-side only and open source under the MIT License, for 1.21.2 – 26.1.2, and changes reinforcement rather than targeting.

ModLoadersGame versionsEnvironmentUpdated
Configurable Zombie AIFabric, Forge, NeoForge and BTA Babricb1.7.3 – 26.2Client and server2026-07-26
Slow Baby ZombieFabric, Forge, NeoForge and Quilt1.20.1 – 26.1.2Client and server2026-05-09
Only Zombies SpawnFabric, Forge and NeoForge1.18.2 – 26.2Server-side only2026-07-08
Revert Zombie ReinforcementFabric, Forge, NeoForge and Quilt1.21.2 – 26.1.2Server-side only2026-03-29

Questions

Does Configurable Zombie AI need Fabric Language Kotlin on Fabric?

Yes. Fabric Language Kotlin is required on Fabric, and YetAnotherConfigLib (YACL) is required on all loaders.

Does the server need the mod, or can players join without it?

Every player and the server need a copy of the mod.

Can Configurable Zombie AI run alongside Zombies Apocalyptic AI?

No. The mod is incompatible with Zombies Apocalyptic AI and with Zombies Ignore LOS, so only one of them should be installed.

In the catalog

Configurable Zombie AI is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 13,894 mods support Minecraft 26.2.

Mobs mods11,058Fabric modsMods for 26.213,894

More from oggvik

All projects
Hear the Wind1.14 – 26.3Fullscreen Tweaksb1.7.3 – 26.3Revive Through Grass! [PlayerRevive add-on]1.10.2 – 26.3OpenFlares - Flare Guns!1.21 – 26.2Zombies Apocalyptic AI1.16.5Oggvik's Inventory Freeze1.16.5

Similar mods

[EMF] Entity Model Features1.18.2 – 26.3L_Ender's Cataclysm1.19.2 – 1.21.5Alex's Mobs1.16.5 – 1.20.1Guard Villagers1.16.5 – 26.3Touhou Little Maid1.16.5 – 1.21.1Creeper Overhaul1.18.2 – 1.21.1

What the author says

Configurable Zombie AI is a mod that makes vanilla zombies easier to tune for harder survival servers and modpacks. Instead of hardcoding one zombie behavior profile, the mod exposes runtime commands for server operators so they can change how zombies detect, acquire, keep, and switch targets without restarting the…
oggvik, on the Modrinth page

Official listing

Owner
oggvik
Published
2026-04-11
Updated on Modrinth
2026-07-26
Facts verified
2026-10-15

Tags

Game mechanicsMobsUtility
Open on ModrinthCompare