UHC World Gen Datapack
This datapack tweaks Minecraft world generation for a better UHC game.
It's also intended to be a template for anyone who wants to customize their world generation, because the datapack format is definitely tricky.
This pack was made for version 1.21.4, but should work on 1.21.x and future versions. If breaking changes happen, please make an issue and I will try to update it!
Features
- No oceans (large-ish rivers still generate)
- Increased frequency of small caves
- Less extreme mountains and hills
- World bottom moved to -32 instead of -64
- Rebalanced generation of ores (you can further customize this yourself too)
See FEATURES.md on my GitHub for a full list of features and how to customize them.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
Verified by MCModsHub
- Downloads as uhc-datapack.zip
- Download size: 26 KB
- Download link checked 22 Aug 2026 — working
These come from our own check of the pack file, not from the source page.