Mountain World

Make your home on a mountainside or follow a valley between towering peaks.

Mountain World fills the overworld with steep slopes, deep valleys, cliffs, and waterfalls. Ores and supported structures are placed to suit the terrain, with lowland villages in valleys and snowy villages higher up.

This is a mountain-focused survival world. Ocean monuments, shipwrecks, and ocean ruins are excluded from its layout.

Requires Isekai API. This changes the overworld rather than adding another dimension. Start a new world for a consistent landscape, and do not combine it with another overworld-generator replacement. Existing chunks are not rebuilt.

Paid commissions for videos, streams and servers. Send me your idea: [email protected]

All Rights Reserved. Free to include in any modpack, on any platform, monetized or not, without permission or credit.

Source: https://github.com/KURONAMI333/mountain-world

Bugs and questions: comment on the CurseForge page or DM @kuronami333 on X.

The overworld, reforged as endless mountains. Towering snow-capped peaks, plunging chasm valleys, cliff-face waterfalls — the whole world becomes dramatic high-relief terrain instead of gentle plains. Built on Isekai API.

What it does

Mountain World turns the overworld into all-mountain terrain — peaks reaching Y 280+, valleys cut down to Y 80, rugged relief everywhere. Every vanilla biome, ore, structure, and mob is remapped into the mountain volume by Isekai API, so it still feels like Minecraft — just gone vertical.

Features

• All-mountain overworld — towering peaks, deep valleys, cliffs and waterfalls across the whole world.
• Altitude-aware structures — lowland villages settle in the valleys (Y 80-140); snowy villages perch high on the slopes (Y 200-280); strongholds stay deep underground.
• Vanilla content preserved — ores, structures, and mobs are remapped into the mountain terrain (no empty worlds).
• Ocean cleanup — ocean monuments, shipwrecks, and ruins are excluded so the peaks stay clean.

Requires

Isekai API (required) — Mountain World is a datapack-style worldshape built entirely on Isekai's worldgen primitives.

Compatibility

Coexists with TerraBlender, YUNG's structure mods, map mods (Journeymap etc.), and dimension mods like Nullscape. Mutually exclusive with other overworld-overhaul mods (Terralith, William Wythers') — only one mod can own the overworld; no crash, last-loaded wins.

Related projects

• Isekai API — required worldgen framework these worlds are built on
• Sky World — sister world: the overworld as a vertical sea of floating islands
• Tropical World — sister world: the overworld as a sunlit tropical sea with sandy islets
• Tundra World — sister world: the overworld frozen end to end

Paid commissions for videos, streams and servers. Send me your idea: [email protected]

All Rights Reserved (free to put in any modpack, no permission or credit needed). Source & issues: https://github.com/KURONAMI333/mountain-world. Built on Isekai API.