How to install FO | Modpack (2024)

Here are the instructions to install Fabulously Optimized to various launchers.

Can't use Minecraft 1.17 and higher due to hardware limits? Follow this tutorial and then retry.

Supported

CurseForge App

1. Select Minecraft from the grid or sidebar

2. Search "Fabulously Optimized"

3. Click Install

   • Optional: Select the version you want by instead clicking the row → Versions → ⤓.

4. To run the modpack, hover on the modpack icon and click Play

5. Once the Minecraft Launcher has opened, click Play again

Or directly from the website:

1. Go to the listing page on CurseForge

2. Click Install and accept the prompt in your browser

   • Optional: Select the version you want by instead clicking Files → the version you want → Install.

3. The app should open and download should start

4. To run the modpack, hover on the modpack icon and click Play

5. Once the Minecraft Launcher has opened, click Play again

Modrinth App

App version 0.6.2 or higher required.

1. Under "Popular packs" section, hover on "Fabulously Optimized"

2. Click ⤓ Install

   • Optional: Select the version you want by instead clicking the tile → Versions → ⤓ on the version you want.

3. The modpack will now install.

4. Once installed, hover on the created instance under "Jump back in"

5. Click ▶️ button to play.

Prism Launcher

You need Java 21 to play the game.

1. Click Add Instance

2. Select Modrinth tab from the left

3. Select "Fabulously Optimized"

4. Click OK

   • Optional: Select the version you want by selecting it on the dropdown before you click OK.

5. The modpack will now install.

6. Once installed, double-click the icon to play.

Steam Deck + Prism Launcher

1. With Steam Deck turned on, hold down ⏻ (power) and tap Switch to Desktop.

2. From the taskbar, select 👜 "Discover".

3. Tap the searchbar on the top left corner, then press ❎ to open the on-screen keyboard.

4. Search for "Prism Launcher" and tap Install on the first result.

5. Launch it and go through its initial setup process, then close it.

6. Open Steam app, select Games → Add a Non-Steam Game to My Library... → select Prism Launcher → ADD SELECTED PROGRAMS.

7. Close Steam and launch Return to Gaming Mode.

8. Launch Prism Launcher from your game library.

9. Tap Add Instance

10. Select Modrinth tab from the left

11. Select "Fabulously Optimized"

12. Click OK

• Optional: Select the version you want by selecting it on the dropdown before you click OK.

13. The modpack will now install.

14. Once installed, double-tap the icon and wait.

15. Tap Options... → Controls... → Controller Settings...

16. Select a controller, then Done → Done → Done

17. The game is now set up and you can just launch it from your game library from now on.

18. Bonus: if you want a better icon in your game library, follow these instructions.

P.S. If you get Deck-specific issues, try asking on r/SteamDeck as FO moderators may not have one.

MultiMC

You need Java 21 to play the game.

1. Click Add Instance

2. Select Modrinth tab from the left

3. Select "Fabulously Optimized"

4. Click OK

   • Optional: Select the version you want by selecting it on the dropdown before you click OK.

5. The modpack will now install.

6. Once installed, double-click the icon to play.

MultiMC (auto-update)

You need Java 21 to play the game.

1. Download the pack for your preferred Minecraft version:

   • 1.21 | 1.20.6 | 1.20.4 | 1.19.4 | 1.18.2 | 1.17.1 | 1.16.5

   • Other versions can be found from GitHub Releases

2. Drag the ZIP-archive to MultiMC window, and hit OK in the window that pops up.

3. Double-click that version you just created to download and launch the modpack

Minecraft Launcher (vanilla)

For macOS or Linux you need Java to run the Fabric Installer.

1. Download and install Fabric Loader version 0.15.11

   • Remember that the installer version doesn't matter, what matters is the loader version that appears when you run the installer.

2. Open Minecraft Launcher, click Installations, then click 📂 on the Fabric installation

3. Open this site, then click the ⬇️ button

   • Optional: Select the version you want by selecting it on the dropdown before you click ⬇️.

   • If you got a prompt for popup windows or multiple downloads, please accept it - technical limitation.

   • Looking for older versions? Read the "legacy instructions" below.

4. Open the zip file and copy all folders (why?) to your .minecraft folder

   • If asked - replace the files.

5. Recommended: delete options.txt to get FO default settings

   • Your vanilla options like selected resource packs, language, keybinds will be reset but you can reapply them later.

   • If you choose not to do this, please at least enable bundled resource packs manually.

6. Launch the installed Fabric profile

7. If you now see "Fabulously Optimized" in the right bottom corner, you're done!

A simple installer for vanilla launcher is planned!

Not supported

GDLauncher

Due to technical limits and issues, GDLauncher is no longer supported. It is recommended to migrate to Prism Launcher:

1. Install and run Prism Launcher

2. Click Add Instance

3. Select Modrinth tab from the left

4. Select "Fabulously Optimized"

5. Click OK

6. The modpack will now install.

7. Once installed, click the Folder button on the left.

8. Open GDLauncher

9. Right click on your previously used instance → Open Folder

10. Copy the important files and folders over:

• saves - your local worlds

• resourcepacks - if you added any (it is not needed to copy the modpack defaults)

• shaders - if you use any

• screenshots - screenshots you've taken with F2 or F9

• servers.dat - your multiplayer servers

• options.txt - if you want to keep your vanilla option and all hotkey changes

11. Launch the instance on Prism and confirm everything is correct

12. Uninstall GDLauncher

GDLauncher Carbon may be supported in the future.

Pojav Launcher

Pojav Launcher is not yet supported due to drawbacks (long installation process, high energy usage, performance may not be better etc), but is being considered.

ATLauncher

Not to be confused with TLauncher.

ATLauncher is currently not supported simply because the interface is confusing and complex. There have been discussions with its developer to improve this and it may be considered in the future.

PolyMC

PolyMC is compromised and you should uninstall it immediately!

To migrate to Prism Launcher (a safe fork of PolyMC), follow these instructions:

1. Uninstall PolyMC

2. Install Prism Launcher

3. Launch it and pay attention to the prompt you get:

   1. It looks like you used PolyMC before. Do you want to migrate your data to the new location of Prism Launcher?

      • Click Yes and the migration will complete.

   2. It looks like you used PolyMC on Windows before. Do you want to migrate your data to the new location of Prism Launcher?

      • Click Yes and the migration will complete.

   3. Old data from PolyMC was found, but you already have existing data for Prism Launcher. Sadly you will need to migrate yourself. Do you want to be reminded of the pending data migration next time you start Prism Launcher?

      • Click No and follow manual migration instructions below.

4. If needed, update or install the modpack again

5. To run the modpack, double click the Fabulously Optimized icon

TLauncher

Not to be confused with ATLauncher.

TLauncher is malware, so it will never be supported by Fabulously Optimized. It is highly recommended to reset your entire computer, then come back to this page and follow install instructions for any supported launcher.

Cracked launchers

Any launchers that let you run the game without having purchased it first are not supported.

There is a legitimate way to obtain Minecraft for cheaper: get a giftcode from a trusted reseller. After that, pick any supported launcher from this page and enjoy the game!

Other launchers

Technically you can install it in some other launchers that support CurseForge or Modrinth modpacks or in any launcher by following the vanilla instructions. However, please do not ask for support here if you use an unsupported launcher.

Other modpacks

Some users have experienced interest in using FO with other, content-focused modpacks.

While it is theoretically possible, this is not advised:

• mods may have conflicts

• neither FO or the other modpack will be able to support you

Instead, we recommend you to use FO with other mods added by you.

If you'd still like to do it on your responsibility, just install the other modpack first and then copy FO's files on top (see vanilla instructions).

Game clients

Fabulously Optimized is not compatible with any "game clients", including "hacked clients" and "PvP clients". Use normal mods instead!

Bedrock Edition

Fabulously Optimized is not compatible with Bedrock Edition. See also: Pojav Launcher

Servers

Any server that works with vanilla Minecraft is supported, no changes are necessay to the server. See server setup for tips.

Quilt

Fabulously Optimized is based on Fabric, not Quilt.

It can be attempted to run it through Quilt, but not all mods and configurations work without changes. If you do attempt it, you're on your own - do not ask for support from the modpack.

The sustainability and popularity of Quilt is being tracked in issue #257.