ModsFinder

Lock (Guard) Essential

by Blckerrr

Lock (Guard) Essential is a client-side Optimization mod that makes the Essential client refuse to load when it is installed alongside this mod.

FabricForgeNeoForgeQuiltClient-side onlyGNU General Public License v3.0 only1.19.2 – 1.21.1

What it does

Once the mod is present, the Essential client stops loading and the game does not start with it installed. Modpack authors and mod creators can use it to enforce a modpack environment that excludes Essential. Only the client needs it, so servers run without it. Fabric API, Quilted Fabric API (QFAPI) and Quilt Standard Libraries (QSL) are optional. Builds cover 1.19.2 – 1.21.1 across Fabric, Forge, NeoForge and Quilt, and the license is the GNU General Public License v3.0 only, so the mod is not open source.

Key features

  1. Blocks Essential

    Installing this mod makes the Essential client incompatible, so the game refuses to load while both are present.

  2. Enforces modpack rules

    Mod creators and modpack authors can use it to keep a modpack's intended environment free of Essential.

  3. Preserves environments

    It helps maintain the environment a modpack was built for by blocking one specific client mod from loading.

Compatibility

Latest build for each game version and loader.

1.21.1Not availableNot available1Not available
1.20.21Not availableNot available1
1.20.111Not available1
1.201Not availableNot available1
1.19.4Not available1Not availableNot available
1.19.2Not available1Not availableNot available
ReleaseBetaAlphaNot available

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

Requirements

Dependencies declared by the latest file for each loader.

Optional 2

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Optional
Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL)The standard libraries of the Quilt ecosystem. Essential for your modding experience on Quilt!
Optional

How it compares

Full comparison

Not So Essential is client-side only and open source under the GNU Affero General Public License v3.0 only, for Fabric and Forge across 1.8.9 – 26.2. Impactor is open source under the MIT License, server-side only, and covers Fabric, Forge and NeoForge for 1.19.2 – 1.21.1.

ModLoadersGame versionsEnvironmentUpdated
Lock (Guard) EssentialFabric, Forge, NeoForge and Quilt1.19.2 – 1.21.1Client-side only2026-05-09
Not So EssentialFabric and Forge1.8.9 – 26.2Client-side only2026-08-08
ImpactorFabric, Forge and NeoForge1.19.2 – 1.21.1Server-side only2025-12-24

Questions

Which loaders does Lock (Guard) Essential support?

It is published for Fabric, Forge, NeoForge and Quilt, with the latest Fabric and NeoForge files for 1.20.2 and 1.21.1.

In the catalog

Lock (Guard) Essential is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 32,366 mods support Minecraft 1.21.1.

Optimization mods3,545Fabric modsMods for 1.21.132,366

More from Blckerrr

All projects
crash me!1.19.2 – 1.21.8Blckerr's Api1.19.2 – 1.21.5

Similar mods

Sodium1.16.3 – 26.3Iris Shaders1.16.5 – 26.3Entity Cullingb1.7.3 – 26.3FerriteCore1.16.5 – 26.3ImmediatelyFast1.18.2 – 26.3Sodium Extra1.16.2 – 26.3

What the author says

This simple mod Prevents the game from loading when Essential is installed. Designed for mod creators and modpack authors who want to enforce to not use the Mod Essential.
Blckerrr, on the Modrinth page

Official listing

Owner
Blckerrr
Published
2026-05-08
Updated on Modrinth
2026-05-09
Facts verified
2026-10-15

Tags

OptimizationUtilityLibrary
Open on ModrinthCompare