
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.
Screenshots


About this Mod
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]
Available Versions
How to Install Simulation Breach on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (26.1.2).
Install Mod
Open the mod browser in the dashboard and search for "Simulation Breach". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.2
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Simulation Breach server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.1.2). You can switch loaders with one click in the panel.
Is Simulation Breach compatible with fabric?
Simulation Breach officially supports fabric for Minecraft 26.1.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Simulation Breach – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Simulation Breach consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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