CurseForge · Minecraft mod
Error_405
This mod adds a creature that will unsettle you.
Quick answer
Which Error_405 release should I use?
Error_405-0.5.0-neoforge-1.21.1.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Error_405 required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Error_405-0.5.0-neoforge-1.21.1.jar need?
Error_405-0.5.0-neoforge-1.21.1.jar. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Error_405 without breaking your instance.
Built for Error_405-0.5.0-neoforge-1.21.1.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Error_405-0.5.0-neoforge-1.21.1.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside Error_405-0.5.0-neoforge-1.21.1.jar. It opens that exact file at the source.
About this project
What does Error_405 add?
GlitchRewamp – Error_405
Reality is breaking.
Everything seemed normal.
Then one day, a player named “Error_405” appeared in the tab list.
No one joined with that name. No one invited them.
But they were there.
As the days passed, the world began to change.
Animals suddenly stopped, turned their heads 180 degrees, and stared at you.
Their eyes turned white. Then they crumbled into ash.
Sometimes, from that ash, a black figure rose… and killed you.
This is not just a glitch.
Error_405 came for you.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✦ WHAT THE MOD DOES
Error_405 behaves like an entity that has infected the game itself.
As days progress, it becomes more aggressive, more personal, and more terrifying.
• Error_405 appears as a fake player in the tab list
• Sends a glitched “joined the game” message
• Features a progressive day-based corruption system
• Animals turn their heads 180° and stare before turning to ash
• 30% chance to transform into Deadman and kill you
• Black armor stand appears and completely locks your camera
• Glitched whispers using your friends’ names
• Fake “Connection Lost” screen
• Shadow clone appears behind you and vanishes
• Distant black silhouettes watch you and disappear when looked at
• Items randomly disappear from your inventory
• Doors slam shut by themselves
• Footsteps from behind when you are alone
• Screen invert, blackouts and “SYSTEM RESET” warnings
• Custom walk and glitching sounds
• High corruption causes constant heartbeat and darkness
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✦ PROGRESSION BY DAYS
Day 1–2
Error_405 joins. The first corruptions begin.
Everything still feels mild… but something is wrong.
Day 3–4
Footsteps from behind.
Dark whispers and heartbeat start.
Doors begin slamming shut on their own.
Day 5–6
Fake “Connection Lost” screen appears.
A shadow clone forms behind you.
Animals start watching you.
Day 7+
Deadman transformation becomes active.
Items vanish from inventory.
Black armor stand appears and locks your camera.
Day 9+
Static vision and name corruption begin.
Screen briefly inverts.
Day 12+
Constant darkness effect.
Corruptions become much more aggressive.
Day 14+
Final stage.
Inverted screen, system reset warnings, and full collapse feeling.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✦ ATMOSPHERE
This is not a jump-scare focused mod.
Its real horror comes from knowing something is wrong… but never fully understanding what.
When playing alone, footsteps, whispers and shadows follow you.
When playing with friends, glitched messages using their names and shared heartbeats make the fear collective.
Unlike classic horror mods, this one focuses on the feeling that the system itself is breaking.
It feels like the game is watching you, speaking to you, and slowly taking over.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✦ WARNING
This mod contains psychological horror.
Sudden blackouts, fake death screens, camera locks and corrupted messages are present.
Best played alone…
or with a friend who can hear you.
Minecraft 1.21.1 | NeoForge
Developer: [İboxi007]
Project description from CurseForge.
Pick your setup
Error_405 by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Error_405 versions and loaders
Error_405-0.5.0-neoforge-1.21.1.jar
glitch__rewamp-1.5.0-neoforge-1.21.1.jar
19 Sept 2026
Error_405-0.1.5-neoforge-1.21.1.jar
glitch__rewamp-1.1.5-neoforge-1.21.1.jar
4 Sept 2026
Error_405-0.1.0-neoforge-1.21.1.jar
glitch__rewamp-1.0.1-neoforge-1.21.1.jar
3 Sept 2026
Looking for an older file? The official CurseForge project page is in Resources.