GregTech: New Horizons

What sets it apart

GregTech: New Horizons, or GTNH, is a very long expert pack built around GregTech on Minecraft 1.7.10. The wiki describes 15 tiers of progression, starting in a Stone Age and a Steam Age and climbing through named voltage tiers. The stated end goal is to build the Stargate.

The scale is what the official site leads with: more than 300 mods and a quest book with over 3,900 quests. The wiki says the pack has been in development for over 11 years and is maintained by community members. The site adds that the team keeps its own forks of many older mods and writes mods only used in this pack, which is how a 1.7.10 pack now runs on modern Java.

Alongside GregTech, the wiki has sections for Applied Energistics 2, Thaumcraft, Blood Magic, Botania, Witchery, Forestry, Railcraft and Twilight Forest.

Who it suits

It suits players who want one world to last many months and who enjoy planning production lines in detail. The quest book is large enough to act as the manual.

It is not a casual pack. Anyone wanting quick progress or modern Minecraft features should look elsewhere, since everything is tied to 1.7.10 and the GregTech tier system.

Before you install

The official download is on the pack’s own site, not a store launcher. The wiki recommends Prism Launcher and advises against CurseForge and Technic, saying the CurseForge copy is usually out of date.

There are separate downloads for Java 8 and for newer Java. The wiki recommends Java 25 or later for current releases and notes that Java 25 needs GTNH 2.8 or newer. The downloads page shows 2.9.0 as the current version.

For memory, the wiki recommends 4 to 6 GB for single player at render distance 16 and at least 4 GB for a client joining a dedicated server. It warns that giving Java 8 more than 8 GB tends to cause stutter.

Playing with friends

Official server packs are on the same downloads page, again split by Java version. The wiki says to get server files only from there or from links in the official Discord’s announcements channel.

The Server Setup page recommends Java 17 or newer and a base of 6 GB of RAM, adding 0.5 GB per extra player early on and 1 GB per extra player in late tiers. It lists 20 GB or more of storage and stresses single-thread CPU speed.

Client and server must run exactly the same GTNH version. The wiki also covers whitelisting, backups and chunk loading, and it points beginners toward third-party hosts.