
Sanity System
A subtle psychological horror mod that adds a hidden sanity system, immersive hallucinations, and fear-based survival mechanics to Minecraft 1.21.4 Fabric.
Screenshots





About this Mod
🧠 Sanity System – Psychological Survival
A subtle psychological horror experience for Minecraft 1.21.4 (Fabric)
What if the real enemy wasn’t a monster… but your own mind?
Sanity System – Psychological Survival introduces a hidden mental stability mechanic to Minecraft. Darkness, isolation, and fear slowly erode your sanity, causing immersive hallucinations, environmental distortions, and subtle horror events.
There are no loud jumpscares. No overpowered monsters. No constant chasing.
Instead, your world begins to feel… wrong.
🔥 Features
🧠 Hidden Sanity Mechanic
Sanity ranges from 0–100.
Affected by: darkness, deep caves, isolation, lack of sleep, thunderstorms, the Deep Dark, and exposure to cold rain and water.
Restored by: bright light, sleeping, villages, music, standing near other players, animal companionship (tamed wolves & cats), finding peace at high mountain altitudes, and holding a clock to ground yourself.
👁 Psychological Hallucinations
Fake footsteps and whispers heard just out of sight.
Shadow figures watching you in the distance.
Fake hostile mob sounds creeping up behind you.
Torches that randomly flicker.
Screen desaturation and subtle, panic-inducing visual distortions.
A rare “watching” entity that immediately disappears when you look at it.
🌑 Dynamic Fear System The lower your sanity:
The more intense and suffocating the hallucinations become.
The more frequent the strange disturbances.
The more your perception of reality becomes completely unreliable.
👥 Multiplayer Compatible
Each player experiences completely independent hallucinations.
Fully server-safe with no gameplay imbalance.
⚙ Fully Configurable
Enable or disable specific hallucinations.
Adjust base sanity drain and regen rates.
Toggle visual and screen distortion effects.
Gamerule support and admin commands included.
🎮 Designed For:
Hardcore survival players looking for a gritty challenge
SMP servers wanting a unique twist
Horror and suspense modpacks
Content creators looking for atmospheric gameplay
Players who love immersive, psychological experiences
🎧 Experience Minecraft Like Never Before
Mining alone feels different. Night becomes heavier. Silence becomes unsettling.
You won’t know if what you saw… was real.
Available Versions
How to Install Sanity System 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 (1.21.4).
Install Mod
Open the mod browser in the dashboard and search for "Sanity System". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.4
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Sanity System 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 (1.21.4). You can switch loaders with one click in the panel.
Is Sanity System compatible with fabric?
Sanity System officially supports fabric for Minecraft 1.21.4. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Sanity System – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Sanity System 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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Rent Modded Server
Install Sanity System with just one click on your server.