Only Zombies Spawn

Only Zombies Spawn is a lightweight mod that restricts hostile mob spawns exclusively to zombies. When a non-zombie monster attempts to spawn, it is automatically replaced with one or more zombies.

Features

• Spawn Replacement: Replaces all hostile mobs (monsters) with zombies.
• Wide Coverage: Works for natural spawns, mob spawners, chunk generation, structures, and patrols.
• Boss Exclusion: Ender Dragons and Withers are excluded from replacement and will spawn normally.
• Spawn Multiplier: Configure between 1 to 40 zombies to spawn in place of a single replaced mob.
• Persistence Inheritance: If the original mob was set to not despawn (e.g., via a Name Tag), the replacement zombies will also inherit this persistence.

Configuration

You can open the configuration GUI in-game using the /ozsconfig command to adjust the following settings:

• Allowed Mobs (allowedMobs): Specify a list of mobs that should be allowed to spawn normally without being replaced.
• Disabled Dimensions (disabledDimensions): Specify dimensions (e.g., The Nether, The End) where the mod's effects should be disabled.
• Zombie Spawn Multiplier (zombieSpawnMultiplier): Set the number of zombies that appear per replacement (Default: 1).

The configuration file is saved at config/onlyzombiesspawn.properties.

Supported Versions

• Forge: 1.18.2, 1.19.2, 1.20.1
• NeoForge: 1.21.1, 26.1, 26.1.2
• Fabric: 1.20.1, 1.21.1, 26.1, 26.1.2

Perfect for zombie-themed worlds, custom modpacks, and survival challenges.

Only Zombies Spawn

Only Zombies Spawn is a simple mod that makes zombies the only hostile mob that can spawn.

All other hostile mobs are blocked from spawning, including mobs spawned by mob spawners.
This keeps gameplay straightforward and creates a world where hostile encounters are focused entirely on zombies.

Features

• Only zombies can spawn as hostile mobs
• Prevents all other hostile mobs from spawning naturally
• Prevents all other hostile mobs from spawning from spawners
• Keeps the concept simple and easy to understand
• Designed for players who want a zombie-only survival experience

Supported Versions

• Forge 1.20.1
• NeoForge 1.21.1
• NeoForge 26.1

Notes

• This mod is intended to make hostile mob spawning zombie-only
• Friendly and neutral mobs are not the focus of this mod
• Built for lightweight, easy-to-use gameplay customization

Perfect For

• Zombie-themed survival worlds
• Custom modpacks
• Challenge runs
• Simple hostile mob control