ERROR X
by Jack_7022
ERROR X is a Forge horror mod for Minecraft 1.20.1 that adds a hostile entity appearing at night and a stalking side entity, with jumpscares, flashlight effects and screen glitches.
What it does
Once installed, the mod runs a world event on a timer. Roughly every 24000 ticks, a random event fires, and the world can be turned into a hellish, broken state. The main entity appears only at night, and noises make the screen colorful as it approaches. The second entity stalks animals and other mobs and reacts each time one is killed, so the threat grows with play.
The mod is a single-player and multiplayer client mod for Minecraft 1.20.1, published for Forge only. It requires GeckoLib. The mod is not safe for everyone: the author states it loads jumpscares and flashlights, shows popup messages and displays the PC username. The author describes the mod as harmless, but players sensitive to horror should read the warning before playing.
The project is released under All rights reserved and is not open source. Builds exist for 1.20.1 only, and the latest Forge file is 1.0.1, published on 2025-08-18. The author states that there is no safe version of the mod.
Key features
Timed world events
Random events fire on a roughly 24000-tick cycle, changing the world at intervals.
Night-only main entity
The main entity appears only at night and is paired with colorful screen noise.
Stalking side entity
The side entity follows animals and mobs and responds each time one is killed.
Horror effects
Popup messages, jumpscares, flashlight effects and a display of the PC username are part of the mod.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Horror playthroughs
Players looking for a scary survival run can add the entities and events to a world.
Content creators
Streamers who want jumpscare-style reactions can use the mod, though the author warns about its content.
Who it’s for: The mod suits players who want a horror experience on a 1.20.1 Forge client. The author's warning applies: the mod includes jumpscares, flashlights and popup messages.
How it compares
Error 404 Not Found (Horror Entity) is also a Forge horror mod for 1.20.1, run on client and server, and released under All rights reserved. Lurking Depths is a Forge mod for 1.20.1 that runs on client and server, released under the MIT License, but it is not open source as a project. ERROR X is client-side only, so servers do not need it.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| ERROR X | Forge | 1.20.1 | Client-side only | 2025-08-18 |
| Error 404 Not Found (Horror Entity) | Forge | 1.20.1 | Client and server | 2025-05-05 |
| Lurking Depths | Forge | 1.20.1 | Client and server | 2025-03-17 |
Questions
Does ERROR X need GeckoLib?
Does the server need ERROR X?
Is there a safer version?
In the catalog
ERROR X is one of 11,058 Mobs mods on ModsFinder, and one of 6,527 Mobs mods for Forge. 34,764 mods support Minecraft 1.20.1.
More from Jack_7022
Similar mods
What the author says
FAQ What is this mod? -The error x mod is a horror malware mod will broke your world and turn it to an HELL How the events work? -The event works in minecreaft day timer (24000 ticks), evrey to many ticks, a random event will run
Official listing
- Modrinth page
- modrinth.com/mod/error-x
- Owner
- Jack_7022
- Published
- 2025-08-16
- Updated on Modrinth
- 2025-08-18
- Facts verified
- 2026-10-15