真正的极限模式
by Tea_Leaf_Fox
Within Minecraft 1.21.11, the Fabric mod 真正的极限模式 keeps a Hardcore world from being cheated, rolled back or edited, so the run stays as it was played.
What it does
Once a world is in Hardcore mode, the mod disables the controls that would let a player leave it: the Allow Cheats setting, the game mode buttons and the Open to LAN screen. A world marked as cheated cannot have cheats enabled again, and the game mode cannot be changed, whatever the player does.
Protection works in three layers. The level.dat file is encrypted automatically when the player saves and quits. If someone replaces the world with an older backup after dying, the mod detects the rollback and marks the world as cheated, and such a world is never loaded again. Removing the mod makes the world unloadable, while reinstalling it restores normal access.
The mod is licensed under the Creative Commons Attribution Non Commercial No Derivatives 4.0 license and is not open source, although the source code is public. It needs Fabric API and a configuration file, and it runs on the client and the server, so both sides need it.
Key features
Locked Hardcore settings
The Allow Cheats setting, the game mode buttons and the Open to LAN screen are disabled while a Hardcore world is played.
Encrypted level.dat
The world data file is encrypted automatically each time the game saves and quits.
Rollback detection
Replacing a world with an older backup after a death is detected, and the world is then marked as cheated.
Permanent cheated mark
A world marked as cheated stays blocked, and it cannot be loaded again even after the mod is removed and reinstalled.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Fair Hardcore runs
Players who want a single death to end a run can rely on the settings and saves being locked during play.
Competitive challenge worlds
Groups comparing Hardcore results can use the mod to keep each run from being edited or rolled back.
Who it’s for: Players who want Hardcore survival to be enforced by the game, and groups that compare Hardcore results and need saves to stay unaltered.
How it compares
HardSet is a Fabric mod for 1.21.11 that is client and server and is not open source under All rights reserved. DeathRollback is open source under the MIT License, client and server, with files for 1.21 – 1.21.1, so it covers an older range. HardProof is open source under the MIT License, client-side only, for 1.21.5 – 1.21.8, so players can join without installing it.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| 真正的极限模式 | Fabric | 1.21.11 | Client and server | 2026-05-25 |
| HardSet | Fabric | 1.21.11 | Client and server | 2026-06-09 |
| DeathRollback | Fabric | 1.21 – 1.21.1 | Client and server | 2026-05-31 |
| HardProof | Fabric | 1.21.5 – 1.21.8 | Client-side only | 2025-09-18 |
Questions
Does 真正的极限模式 need Fabric API?
Does the server need the mod as well?
What happens if the mod is removed from a cheated world?
In the catalog
真正的极限模式 is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 19,862 mods support Minecraft 1.21.11.
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What the author says
A lightweight Fabric mod for Minecraft 1.21.11 that makes Hardcore mode truly hardcore. Features: - Locks the "Allow Cheats" and "Game Mode" buttons in the Open to LAN screen when playing in Hardcore mode. You cannot enable cheats or change game mode no matter what. - Automatically encrypts your level.dat file when…
Official listing
- Modrinth page
- modrinth.com/mod/true-hardcore-fix
- Owner
- Tea_Leaf_Fox
- Published
- 2026-05-25
- Updated on Modrinth
- 2026-05-25
- Facts verified
- 2026-10-15