Installing and Migrating

This page discusses how to install the modpack using Technic or MultiMC, and how to migrate the modpack from one installation type to another.

= Technic =

= MultiMC = To install GTNH on MultiMC, you will need to prepare a vanilla Instance and install Forge first. For this, go to Add Instance and choose 1.7.10 in the Vanilla tab. Optionally you can give the instance a meaningful name too. Then select your new instance and click Edit Instance. There click Install Forge in the Version tab. The required Forge version is 10.13.4.1614 (which is the latest and should be the top entry in the list). Now you need to get the modpack files. These are easiest to get from http://downloads.gtnewhorizons.com/ClientPacks. Make sure to download the correct version. The zip archive you will find a minecraft folder, that contains all the important files. You will need to copy its contents to the .minecraft folder of your MMC instance. You can jump to the appropriate folder from within MMC by selecting the instance and clicking the Minecraft Folder button on the right. If you later update the modpack, (backup first and then) make sure to delete the config, mods, resources and scripts folders from your instances .minecraft folder before copying the new files from the downloaded archive. This ensures you don't get duplicate files in case of mod updates and makes sure you really remove the files from mods that got removed.

If you feel fancy, you can also grab the modpack logo in gorgeous 400px beauty from https://minecraft.curseforge.com/projects/gt-new-horizons by clicking the icon next to the title. Then go to MMC, rightclick your instance, choose Change icon and use the Add Icon button.

= Twitch = Due to a change in policy at Twitch, we no longer support releasing the modpack with their launcher. These instructions will go over migrating a world from a Twitch install to a new Technic or MMC install.