If you are using MultiMC you also need to add the additional Java arguments from here.

In the case of Java 17 make sure you are updated to at least 17.0.6, older variants can cause start-up errors.

Under settings - Java, make sure you are using a new version of Java, best 64-bit Java 17 or 64-bit Java 20.

Drag it into the MultiMC/Prism window to create the instance.

Download a MMC/Prism Java17-20 version of the pack from (they are currently labelled as java17-19 or java17-20).

If you are on Windows 10 or 11, make sure you are not installing it in a OneDrive folder! MultiMC or Prism Launcher with Java 17-20 Īt the moment, newer Java versions can only be used with MultiMC or Prism Launcher. If you want to play on a more up-to-date dev release for testing or to get the latest features, you can check Dev Release Stability to see if they have serious problems. If you want to play on a server, then your GTNH client needs to be of the same version as the server. Generally, it is recommended to install the latest stable release - the version that ends on '.0'.

For server installation and updates, see Server Setup.įor all launchers, 5-7 GB of memory (RAM) is recommended for GTNH in singleplayer.

For backups, see Backups and Recovery (already included for singleplayer),.

For compatible mods, see Additional Mods,.

This page shows how to install, update, or migrate a GTNH client.

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