GTO Installation Guide · Update Guide

Chat Groups and Community

It is recommended to join at least one chat group to find like-minded people and **stay updated at all times**

- GTO QQ Groups: α-927923997 (Full) β-532385262 (Full) γ-1091812286 (Full)

- GTO QQ δ-Delta Group:1098734084

- GTO Discord:https://discord.com/invite/PxruFSbtCn

- GTO Github:https://github.com/GregTech-Odyssey/GregTech-Odyssey

- GTO Paratranz(en):https://paratranz.cn/projects/16320

- GTO Paratranz(ru):https://paratranz.cn/projects/16525

- GTO Aifadian:SURIED is creating GTO | Aifadian

- GTO Patreon:https://patreon.com/Suried

About GTO

  GregTech-Odyssey is a deeply performance-optimized, GregTech-centric modpack, featuring350+ multiblock structures, interesting mechanics, and functional chambers that increase production scale, while integrating magic mods to enrich the overall gameplay experience. As the core mod, GTOCore not only deeply customizes the game progression, but also bringsmachine combination mode(enabling automatic switching of machine modes) and multithreading optimization, and addsstructural module gameplayas well as EMI and AE feature enhancements. Through deep modding, the pack has achievedfaster startup, significantly improved FPS,and still maintains good smoothness and stability in late-game large-scale automation and multiblock structure scenarios.

Game Launcher

To ensure the best gaming experience, it is strongly recommended to use PrismLauncher as the preferred launcher. Using other launchers may cause issues such as abnormal resource loading or loss of modified recipes for vanilla items, thereby affecting normal gameplay.

If you only need to play in offline mode (i.e., without a paid account), you can download this version: Diegiwg/PrismLauncher

Modpack file

Adjust game difficulty

After successfully launching the game, you can adjust the game difficulty through the following path:Main Menu → MOD → Search GTOCore → Configuration → Gameplay → Game Difficulty,Or set it directly on the Create New World screen. After adjusting, be sure torestart the game. Please note,Do not switch game difficulty during gameplay,Otherwise, save files may become inaccessible. For differences between difficulties, refer toDifficulty Features Guide.

Java settings

GTO currently supports Java 21, 25, 26. We recommend you use Java 25. We may change the compatible Java versions at any time.

Please use Java25 to enter the game, and check the option to skip Java compatibility check

How to update the integration package

Visit Releases page, and download the latest GregTech.Odyssey-[版本号].zip client modpack.

After installing the latest version of the integration package, copy the following folders or files from the old version to the new version as a whole:

1. local (local cache)

2. saves (save files)

3. gtceu (ore vein markers)

4. options.txt (game settings)

5. xaerosmap (map data)

6. resourcepacks (resource packs)

7. shaderpacks (shaders)

8. emi.json (EMI bookmarks)

MOD related

• During the installation of the modpack, there will be some optional mods. You can go to Optional Mods Introduction · gtowiki to view the introduction

• The server installs all optional mods by default. Server owners should check the optional mod list themselves to add or remove mods.

• Do not add I18N, as it will overwrite the modpack's localization resources and cause translation errors (for Chinese players).

• Do not add additional AE2 addon mods. This modpack uses a self-forked and maintained version of AE2, which is likely incompatible with mainstream AE2 addon mods.