This datapack "Extreme worldgen" change the default vanilla minecraft generator terrain.
Mountains are more realistics, caves are way more extreme, and nether is way more difficult, even with and open celling.
Extreme worldgen changes the default trees too, to more big trees.
Two new biomes added, maple forest and samurai garden.
Nether more overworld like terrain.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.5
- 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 EWG 1.21.5.zip
- Download size: 464 KB
- Download link checked 29 Aug 2026 — working
These come from our own check of the pack file, not from the source page.