UnderMod Mod (1.20.1) – Survive Ancient Sewers and Sail Deep Underground Rivers

UnderMod Mod fills the world beneath your feet with connected underground biomes. It generates giant ancient sewers under villages, hidden forests, and deep rivers that stretch across the map. You can travel through these connected caves to find new blocks and hidden dangers. The mod changes how you play underground without breaking your existing Minecraft worlds.

Features:

• Smooth World Blending: Adapts to your existing save files so you do not get ugly chunk borders.
• Procedural Layouts: Generates unique underground areas every time to keep cave generation fresh.
• Links faraway underground areas together, like sewers pouring into underground rivers.
• Works perfectly alongside other world generation mods you might already have installed.
• Runs smoothly with an optimized generation engine to keep lag low.

Underground Biomes:

• Ancient Sewers: Spawn under villages and connect them through flooded tunnels filled with poisonous water, bandits, and slimes.
• Underground Forests: Grow right beneath regular forests where sinkholes let sunlight in, offering lots of coal and rare ores.
• Giant Craters: Blast deep holes into the earth from meteor strikes, exposing deep caves and valuable space rocks.
• Underground Rivers: Provide safe boat travel deep underground and connect different cave systems to subterranean seas.

How to Use:

1. Look for small, hidden sewer entrances inside normal villages.
2. Buy exploration maps from Cartographer villagers to find sewers easily.
3. Search surface forests for deep sinkholes to drop down into underground forests.
4. Find lost maps hidden by bandits inside sewers to locate rare meteor craters.
5. Take a boat down to subterranean seas to find the start of long underground rivers.

Screenshots:

Requirements:

Minecraft Forge Required

UnderMod Mod Download Links