ModsFinder

No Superflat Slimes

by 0xNull

Players who build superflat worlds keep finding slimes spawning on their flat terrain, and No Superflat Slimes stops that spawn from happening.

FabricForgeClient and serverMIT LicenseOpen source1.12.2 – 26.2

What it does

The mod detects when a world is superflat and cancels slime spawn events in that world, so slimes do not appear there by default. It checks the world type and the entity type before canceling a spawn, and an internal timer limits how often the world type is checked. The mod requires Collective, a library that provides functions it depends on.

Server owners can change behavior without a restart: a configuration menu switches the mod's functionality on or off, and a custom blacklist adds other entity IDs to block from spawning in superflat worlds. The command noslimesuperflat stats reports how many spawns were prevented in the current session.

Install the mod in the mods folder and start the game. The mod is published for Fabric and Forge across 1.12.2 – 26.2, with four release versions and 1.4.2 for 1.12.2 as the latest Forge file. It is open source under the MIT License.

Key features

  1. Slime prevention

    Slimes no longer spawn in superflat worlds once the mod detects that world type.

  2. In-game configuration

    A menu lets players and server owners turn the mod's functionality on or off without restarting the game.

  3. Custom blacklist

    Other entity IDs can be added so they are also blocked from spawning in superflat worlds.

  4. Spawn statistics

    A command reports how many spawns were prevented during the current session.

Compatibility

Latest build for each game version and loader.

26.21.4.1Not available
1.21.11.4.0Not available
1.16.5Not available1.3.0
1.12.2Not available1.4.2
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

Slime Chunk Finder is a client-side only Fabric and Forge mod for 1.20.1 – 1.21.4 under All rights reserved, so it locates slime chunks rather than blocking spawns. Craftable Slime Balls is server-side only, works on Fabric, Forge and NeoForge for 1.8.9 – 1.21.11, and is licensed under the MIT License. No Slime XP is server-side only, Fabric only and limited to 26.1 – 26.1.1, and it stops slime experience rather than slime spawns.

ModLoadersGame versionsEnvironmentUpdated
No Superflat SlimesFabric and Forge1.12.2 – 26.2Client and server2026-06-28
Slime Chunk FinderFabric and Forge1.20.1 – 1.21.4Client-side only2024-12-17
Craftable Slime BallsFabric, Forge and NeoForge1.8.9 – 1.21.11Server-side only2026-04-19
No Slime XPFabric26.1 – 26.1.1Server-side only2026-03-27

Questions

Does No Superflat Slimes require another mod?

Yes. The mod requires Collective, a library that supplies functions it uses, so Collective must be installed alongside it.

Do both the server and players need the mod?

Yes. Installation covers the server and each player's game.

Can the blocked entity list be changed?

Yes. The custom blacklist option lets server owners add other entity IDs to block from spawning in superflat worlds.

In the catalog

No Superflat Slimes is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 13,894 mods support Minecraft 26.2.

Utility mods36,990Fabric modsMods for 26.213,894

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What the author says

No Slime Superflat is a simple utility mod for Minecraft that prevents slimes from spawning in Superflat world
0xNull, on the Modrinth page

Official listing

Owner
0xNull
Published
2026-05-29
Updated on Modrinth
2026-06-28
Facts verified
2026-10-15

Tags

Utility
Open on ModrinthCompare