KillTheRNG
Java mod listed for Minecraft 1.12. Downloads from the MC Java Mods app on Android.
⬇ Download on ModrinthThis mod is abandoned, you should not use this
Removing Minecraft RNG in the most brutal way possible
Patches every call to JavaRandom to be deterministic.
Used as an optional dependency for TASmod and in Tool-Assisted Speedrunning to make the game deterministic.
Can be used to change RNG seeds individually, for scientific purposes.
Commands
/killtherng <RNGName> Read the current RNG seed of that value and how many times it has been called/killtherng <RNGName> <RNGSeed> Set the seed of that value./seedingmode Change how and if the RNG value should change. Can be on every tick and more.
Multiplayer
Does work on multiplayer, however a server side installation is required
Caution!
Some unintended side effects may happen when using this in your world. Use with care and play on a backup!
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.12.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as KillTheRNG-Alpha5.jar — drop this file into the mods folder
- Download size: 3.6 MB
- Download link checked 12 Oct 2026 — working
These come from our own check of the pack file, not from the source page.