ModsFinder

Game Rules

by Roundaround

Game Rules lets server owners and players in existing worlds change the game rules that vanilla Minecraft exposes, after a world is already created.

FabricForgeNeoForgeQuiltClient and serverMIT LicenseOpen source1.21 – 26.3

What it does

The mod edits game rules in worlds that were already generated, so a rule chosen at world creation can be changed later. On multiplayer servers, editing rules through the mod requires operator permissions. Fabric API is required on every loader the mod supports, and the mod runs on client and server, so both sides need it.

Hardcore worlds get an extra restriction: a rule can only be changed once. A balancing mechanism lets long-running hardcore worlds adjust settings such as vine spreading, so a world that has run for years is not locked forever. The mod records the exact date and time each rule was changed, which lets other people in the world see who changed what and hold players accountable.

The mod is published for Fabric, Forge, NeoForge and Quilt across 17 release versions, 1.21 – 26.3. It is released under the MIT License and is open source, with public source code and an issue tracker.

Key features

  1. Edit rules in existing worlds

    Game rules can be changed after a world has been created, instead of being fixed at creation time.

  2. Hardcore balancing

    Hardcore worlds allow a rule to be changed only once, with a balancing path for long-running worlds.

  3. Change timestamps

    Each rule change is recorded with its exact date and time, so the history of a world can be checked.

  4. Rules simplified over time

    Earlier versions used several variants, some of which made rules immutable. Those variants were removed, so every rule is editable.

Compatibility

Latest build for each game version and loader.

26.x5 of 5 versions with builds
26.32.0.1+26.3-fabric2.0.1+26.3-forge2.0.1+26.3-neoforge2.0.1+26.3-fabric
26.22.0.0+26.2-fabric2.0.0+26.2-forge2.0.0+26.2-neoforge2.0.0+26.2-fabric
26.1.22.0.0+26.1-fabric2.0.0+26.1-forge2.0.0+26.1-neoforge2.0.0+26.1-fabric
26.1.12.0.0+26.1-fabric2.0.0+26.1-forge2.0.0+26.1-neoforge2.0.0+26.1-fabric
26.12.0.0+26.1-fabric2.0.0+26.1-forge2.0.0+26.1-neoforge2.0.0+26.1-fabric
1.21.x12 of 12 versions with builds
1.21.111.1.0+1.21.11Not availableNot available1.1.0+1.21.11
1.21.101.0.1+1.21.9Not availableNot available1.0.1+1.21.9
1.21.91.0.1+1.21.9Not availableNot available1.0.1+1.21.9
1.21.81.0.1+1.21.6Not availableNot available1.0.1+1.21.6
1.21.71.0.1+1.21.6Not availableNot available1.0.1+1.21.6
1.21.61.0.1+1.21.6Not availableNot available1.0.1+1.21.6
1.21.51.0.1+1.21.5Not availableNot available1.0.1+1.21.5
1.21.41.0.0+1.21.4Not availableNot available1.0.0+1.21.4
1.21.31.0.0+1.21.2Not availableNot available1.0.0+1.21.2
1.21.21.0.0+1.21.2Not availableNot available1.0.0+1.21.2
1.21.11.0.0+1.21Not availableNot available1.0.0+1.21
1.211.0.0+1.21Not availableNot available1.0.0+1.21
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Use cases

Who it’s for: Server owners who run multiplayer worlds and players who want to adjust rules in a world after it was created, including hardcore players who need a controlled way to change them.

How it compares

Full comparison

Attribute Base Modifier is server-side only, open source under the MIT License and published for Fabric, Forge and NeoForge across 1.20 – 1.21.8, so it changes attributes rather than game rules. Dimension and Elytra Control is server-side only, open source under the MIT License and published for NeoForge 1.21.1 alone. Proper Rules List for Servers is server required with client optional, under All rights reserved, and covers 1.16 – 1.21.11 on all four loaders, so it is a rules list rather than a rule editor.

ModLoadersGame versionsEnvironmentUpdated
Game RulesFabric, Forge, NeoForge and Quilt1.21 – 26.3Client and server2026-09-20
Attribute Base ModifierFabric, Forge and NeoForge1.20 – 1.21.8Server-side only2025-09-15
Dimension and Elytra ControlNeoForge1.21.1Server-side only2026-07-24
Proper Rules List for ServersFabric, Forge, NeoForge and Quilt1.16 – 1.21.11Server required, client optional2026-03-22

Questions

Does Game Rules require Fabric API?

Yes. Fabric API is listed as a required dependency and must be installed next to Game Rules on every loader.

Which environment does Game Rules need?

It is a client and server mod, so the server and every player need it.

Can a hardcore world change rules more than once?

Hardcore worlds allow a rule to be changed only once, but a balancing mechanism is available for long-running hardcore worlds.

In the catalog

Game Rules is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 8,071 mods support Minecraft 26.3.

Management mods8,016Fabric modsMods for 26.38,071

More from Roundaround

All projects
Inventory Management1.18.2 – 26.3Pickup Notifications1.18.2 – 26.3Axolotl Buckets1.18.2 – 26.3Invisible Frames1.18.2 – 26.3Sprint Indicator1.19 – 26.3Villager Converting1.17.1 – 26.3

Similar mods

Cherished Worlds1.12.2 – 26.3Default Options1.18 – 26.3Axiom1.20 – 26.3Resourcify1.8.9 – 26.3Rebind Narrator1.16.1 – 26.1.2Paxi1.19.2 – 26.1.2

What the author says

Every game rule in your world is available to edit. For multiplayer servers, editing game rules through the mod requires OP permissions. An extra restriction exists for hardcore worlds - game rules in hardcore worlds can only be changed once! This was added as a balancing mechanism to allow long-running hardcore…
Roundaround, on the Modrinth page

Official listing

Owner
Roundaround
Published
2025-03-16
Updated on Modrinth
2026-09-20
Facts verified
2026-10-15

Tags

ManagementUtility
Open on ModrinthCompare