No more slime on flat world
No more slime on flat world turns off natural slime spawning in Superflat worlds, so builders on flat terrain are not interrupted by slimes.
What it does
Superflat worlds normally allow slimes to spawn naturally, which can interrupt building and survival play on a flat map. This Fabric mod stops that spawning by default. A game rule controls the behavior, so a server owner can switch slime spawning back on in Superflat worlds at any time, and the change applies without regenerating the world.
The mod is server-side only, so only the server needs it and players join without installing anything. The code is under the MIT License, and the mod is published for 26.1.2 with a single file, 1.0.0, dated 2026-06-03. It is intended for creative projects, skyblock-style maps and other flat worlds where a cleaner experience is wanted.
Key features
Disables natural slime spawning
Slimes no longer spawn naturally in Superflat worlds while the mod is active, which is its default state.
Game rule toggle
A game rule turns slime spawning in Superflat worlds on or off, letting a server owner choose the behavior.
No world regeneration
The setting takes effect on an existing world, so no new world has to be generated to change it.
Lightweight design
The mod does one narrow job on the server and adds no client-side content for players to install.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Flat building projects
Creative builders on a Superflat world can work without slimes spawning around their structures.
Skyblock-style maps
Map makers running island or skyblock setups on flat terrain can keep slimes from appearing on their platforms.
Who it’s for: Server owners and builders who run Superflat or flat-terrain worlds and do not want natural slime spawns there.
Questions
Does No more slime on flat world need to be installed on clients?
Which loader does No more slime on flat world use?
Can slime spawning be turned back on in Superflat worlds?
In the catalog
No more slime on flat world is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 15,189 mods support Minecraft 26.1.2.
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What the author says
Tired of slime mobs constantly spawning in your Superflat world? No Slimes on Superflat disables natural slime spawning in flat worlds by default, making your building and survival experience much more peaceful.
Official listing
- Modrinth page
- modrinth.com/mod/no-more-slime-on-flat-world
- Owner
- burgjonathan1
- Published
- 2026-06-03
- Updated on Modrinth
- 2026-06-03
- Facts verified
- 2026-10-15