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How to install "OptimumFuse"

[1.21.5] [Fabric📜] An open-source modpack that improves the game's performance and visuals, inspired by OptiFine, while staying true to the vanilla Minecraft experience.

Author

UltimatChamp

Downloads

38.4K

Last Updated

Nov 5, 2025

License

Apache-2.0

Mod Loaders

Fabric Forge NeoForge Quilt

Minecraft Versions

1.21.5 1.20.6 1.16.5
lightweight multiplayer optimization

Quick Install ID

#optimum-fuse

Install OptimumFuse in GDLauncher

OptimumFuse runs on Fabric, Forge, NeoForge, Quilt. Pick whichever your existing instance uses, or create a new one. GDLauncher installs the correct loader automatically.

Install on Fabric

  1. Open GDLauncher and create a new instance (the + button on the Library page).
  2. Pick the Fabric loader and a Minecraft version that OptimumFuse supports (1.21.5, 1.20.6, 1.16.5 are common choices).
  3. Open the new instance, go to the Addons tab, and click Add Addons.
  4. Paste the Quick Install ID #optimum-fuse, find OptimumFuse in the results, and hit Download. GDLauncher pulls dependencies automatically.
  5. Hit Play. That's it.

Install on Forge

  1. Open GDLauncher and create a new instance (the + button on the Library page).
  2. Pick the Forge loader and a Minecraft version that OptimumFuse supports (1.21.5, 1.20.6, 1.16.5 are common choices).
  3. Open the new instance, go to the Addons tab, and click Add Addons.
  4. Paste the Quick Install ID #optimum-fuse, find OptimumFuse in the results, and hit Download. GDLauncher pulls dependencies automatically.
  5. Hit Play. That's it.

Install on NeoForge

  1. Open GDLauncher and create a new instance (the + button on the Library page).
  2. Pick the NeoForge loader and a Minecraft version that OptimumFuse supports (1.21.5, 1.20.6, 1.16.5 are common choices).
  3. Open the new instance, go to the Addons tab, and click Add Addons.
  4. Paste the Quick Install ID #optimum-fuse, find OptimumFuse in the results, and hit Download. GDLauncher pulls dependencies automatically.
  5. Hit Play. That's it.

Install on Quilt

  1. Open GDLauncher and create a new instance (the + button on the Library page).
  2. Pick the Quilt loader and a Minecraft version that OptimumFuse supports (1.21.5, 1.20.6, 1.16.5 are common choices).
  3. Open the new instance, go to the Addons tab, and click Add Addons.
  4. Paste the Quick Install ID #optimum-fuse, find OptimumFuse in the results, and hit Download. GDLauncher pulls dependencies automatically.
  5. Hit Play. That's it.

Before you install

Make sure your Minecraft version matches what OptimumFuse supports. As of the latest release, 1.21.5, 1.20.6, 1.16.5 are supported. OptimumFuse supports multiple loaders (Fabric, Forge, NeoForge, Quilt); pick whichever matches your other mods. GDLauncher checks compatibility for you and won't install something incompatible with the instance you've chosen.

Frequently Asked Questions

Is OptimumFuse free?

Yes. OptimumFuse is free to download and install through GDLauncher. GDLauncher itself is also free and ad-free.

What Minecraft versions does OptimumFuse support?

OptimumFuse supports Minecraft 1.21.5, 1.20.6, 1.16.5. GDLauncher will automatically pick a compatible version when you install it.

Does OptimumFuse require Forge or Fabric?

OptimumFuse supports Fabric, Forge, NeoForge, Quilt. Pick the loader that matches your other mods, or let GDLauncher set up a fresh instance for you.

How do I install OptimumFuse?

Open GDLauncher, go to your instance's Addons tab, click Add Addons, and paste the Quick Install ID #optimum-fuse. GDLauncher handles dependencies and the right Minecraft version automatically.

Who made OptimumFuse?

OptimumFuse is made by UltimatChamp. The full project lives on Modrinth (https://modrinth.com/modpack/optimum-fuse).

Need help?

Read our troubleshooting guide, check the guides section, or join the GDLauncher Discord community.

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