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Simulation Breach

Simulation Breach is a Minecraft Java Edition Fabric mod where the world treats players like breaches in the simulation. The system answers by assigning Agents: hostile entities that can emerge from ordinary mobs, pursue players, and recruit more agents.

Fabric
Loaders
Fabric
Downloads on Modrinth
132
Followers on Modrinth
1
versions
2
Updated
May 9, 2026May 9
Published
in 2026
Used to be cows — An agent ran by these former cows and recruited them. I fought off the first agent. · swipe

At a glance

Runs on Fabric
For Minecraft 26.1.2
Needed in the game and on the server
Latest version — 1.0.1 from May 9, 2026
License CC-BY-4.0 — free
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions26.1.2

Simulation Breach turns survival into a quiet systems failure. Ordinary mobs can become Agents, hostile entities assigned by the simulation to correct the player-shaped breach. Agents pursue players, make short detours to convert nearby mobs, and can escalate a calm world into a spreading outbreak if ignored.

Conversions are not instant. A marked mob shakes, plays a custom transformation sound, and can still be killed before the Agent appears. Natural outbreaks are rare, difficulty-scaled, player-adjacent, and bounded by local caps. Staying in one area gradually increases local outbreak pressure, while tamed animals are protected from random outbreak selection but not from an Agent that gets too close.

Version 1 includes The Agent, delayed transformations, custom Agent texture and voice, custom transformation audio, configurable spread rules, XP rewards, natural outbreak alerts, persistent breach data, and an operator debug command for testing.

  • Rare player-adjacent natural outbreaks
  • Hostile Agents that prioritize players
  • Delayed, interruptible transformations
  • Difficulty-scaled and configurable spread
  • Local outbreak pressure when players linger
  • Natural outbreak system alerts
  • Debug command for testing transformations
/simulationbreach transform_nearest [radius=16, max=128]

FAQ

How to install Simulation Breach?

Install Fabric for your Minecraft version, download Simulation Breach for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Simulation Breach support?

Simulation Breach has builds for Minecraft 26.1.2.

Is Simulation Breach needed on the server?

Needed in the game and on the server

License and source
Creative Commons Attribution 4.0 Internationalfree to share with credit to the author and the license
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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