KillTheRNG
KillTheRNG is a Forge library that makes Minecraft's random number generation deterministic for speedrunning and research.
What it does
The library patches the game so that random outcomes come from a JavaRandom source with a fixed, controllable sequence. Each random call then returns the same result for the same state, which lets runs be repeated exactly. Seeds can be changed individually for scientific testing of how the game's randomness behaves.
Key features
Deterministic randomness
Patches route Minecraft's random calls through JavaRandom, so identical inputs produce identical outcomes.
Removes game RNG
The mod strips out the game's usual unpredictable randomness, replacing it with a controlled sequence.
Per-seed control
Random seeds can be changed individually, which supports experiments on specific random events.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Questions
Does KillTheRNG need TASmod to work?
In the catalog
KillTheRNG is one of 36,990 Utility mods on ModsFinder, and one of 14,575 Utility mods for Forge. 2,920 mods support Minecraft 1.12.2.
More from Minecraft TAS
Similar mods
What the author says
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.
Official listing
- Modrinth page
- modrinth.com/mod/killtherng
- Owner
- Minecraft TAS
- Published
- 2023-05-02
- Updated on Modrinth
- 2023-05-02
- Facts verified
- 2026-10-15