How to use Aristois with Forge Modpacks

Before installing..

This page is specifically about installing Aristois with Forge modpacks. For Fabric modpacks, please read here.

Aristois currently supports Forge on 1.8.9 - 1.12.2, 1.16.5, 1.17.1, and 1.18.1. Although Aristois supports Forge, this does not necessarily mean that it is "modpack friendly". Most modpacks contain several mods that conflict with Aristois and will cause a crash. We do not make patches for these types of conflicts.

Page Contents

Installing Aristois to a modpack

Vanilla Launcher

Short Instructions

1. Download and install Forge from the Forge website.
2. Download and run the Aristois installer. Select your version, and then select "Forge mod loader".
3. Place your mods in .minecraft\mods and then run the Forge profile.

MultiMC Launcher

Short Instructions

1. Create a new instance and install Forge to it.
2. Run the Aristois installer. Select "Forge mod loader". Do not select "MultiMC".
3. Change the directory to your instance's ".minecraft" folder. For example: C:\Users\X\Desktop\MultiMC\instances\Modpack\.minecraft\
4. Add your mods to the instance's mod folder and then launch the instance.

Other Launchers

Short Instructions

1. Create or set up your modpack within the launcher.
2. Run the Aristois installer. Select "Forge mod loader".
3. Change the directory to your modpack directory. For example: C:\Users\X\Twitch\Minecraft\Instances\RLCraft\
4. Play your modpack.



It's not uncommon that some mods will conflict with Aristois. While most mods will work just fine, some will cause crashes or other issues in-game. We typically do not fix these types of conflicts. You can always remove the mod that is causing trouble, however if you play on Multiplayer servers this may prevent you from being able to join modded servers.

These are some mods that are known to cause issues with Aristois (Forge). This is not a definite list, as there will always be more conflictions:

  • RandomPatches
  • VanillaFix
  • Performant
  • BYG
  • Create
  • IceandFire
  • Rats
  • DynamicSurroundings
  • Origins
  • VanillaFix
  • CustomMainMenu
  • CustomSplashScreen
  • ForgeEndertech
  • SmoothBoot

If you have any of these mods, try removing them and see if you still crash. If you do, please join our Guilded for further support. If you'd like, you can also try to find the conflict by removing a chunk of mods at a time until it loads correctly. Gladly report any new conflicts to us so we can add it to the list.

Aristois not Loading

Although a much rarer issue now, some third-party launchers will prevent Aristois libraries from correctly installing, which causes only EMC to load and not Aristois (You can tell if this occurs because the main menu will look normal, but say EMC in the top corner).

All you have to do to fix this issue is install Aristois to the vanilla launcher and run it once to generate the libraries. Then, copy the libraries .minecraft/libraries/EMC/ to the libraries folder in your modpack/launcher.


If you notice that your game has frozen while loading, it's possible that the game does not have enough RAM allocated. Depending on the size of the modpack, you may need to allocate several more gigs of space to the game. The default value is 2G.

Stop the game and then go to the installations tab in the launcher. Edit the forge instance. Press "More options" to view the JVM settings. Before increasing the amount, make sure you know how much RAM your PC has. Never allocate more than half your RAM to the game.

To change the amount, replace 2G with a new number, such as 4G. Increase the amount by 1G or 2G if your system can allow it. You should not over-allocate either, more RAM does not equal better. Save and try launching again.

If it still freezes, check for mod conflicts. Remove all mods except for EMC.jar (Aristois). If it works, try the mods individually to figure out which mod is causing the issue.

If it still is loading slowly, try following this Forum post. It will reinstall the libraries and fix most loading issues.

If you still have troubles, please let us know so we can help you.

Uninstalling from Forge

To uninstall Aristois from Forge, all you need to do is remove EMC.jar from your mods folder. If you play on a lower version such as 1.12.2, the .jar will be inside of a sub-folder. For example, \mods\1.12.2\EMC.jar. After deleting this .jar, Aristois will no longer be on Forge.