
Nether Expansion
This mod adds several new biomes, mobs, blocks, and even water to the nether
Screenshots






About this Mod
What the Mod is about
Nether Expansion is a mod that seeks to expand upon the nether and adds new mobs, biomes, blocks, ores, and places to find water in the nether(yes I'm serious).
There are currently 9 new biomes:
Toxic Wastes
Electric Forest
Wet Forest(where the water is)
Nether Desert
Volcanic Wasteland
Lushios Forest
Nether Plains
Frosty Lands
Nether Dripstone caves
And 8 new mobs
Piglin Assassin
Wisp
Radioactive Dweller
Nether Zombie
Nether Creeper
Acidic Walker
Lava Walker
Magma Walker
There are also several new dimensions that are variants of the nether
Acidic nether, an expansion on the toxic delta biome, with two more biomes, the acidic plains and deltas
Overnether, a corrupted version of the overworld, it has all the vanilla nether biomes but without the nether roof
Modded Overnether, the same thing as the overnether but with modded biomes
Dark Nether, the nether if it was dark just like in alpha
Modded Dark nether, modded nether but dark
Floating Nether, the nether but with floating islands, but due to the way biomes in dimensions with end like terrain work, not all biomes spawn, even though it's entirely vanilla biomes, this bug can't be fixed
Floating Modded Nether, same thing but modded biomes, not all biomes will spawn
Modded Nether, the oldest variant of the nether, it was added in 1.0.0 as a home for all the modded nether biomes without any vanilla biomes to override
Tropical Nether, it's lush here, looks nothing like the nether
Amplified Nether, meant to be double the original height, but because I failed to do this, it's just a vanilla nether for now
Currently there is only one new structure, the Nether Tower structure, but I plan to add more in the future
There are also 4 new ores, Aventurine, Infernal, Acidic, and Sapphire. This mod is no longer in beta but still expect more things to be added until I can't update it anymore due to the same thing that happened with my end update mod and winter mod
this mod was made with mcreator even though it doesn't really look like a typical mcreator mod, hopefully that excuses why there's extra dimensions
I made a video on the mod, watch it here
I am aware of a bug that makes the nether wastes biome have grass blocks on the surface instead of netherrack within modded dimensions, this has nothing to do with this mod itself, it affects other mods as well, this bug is only fixable by creating a custom nether wastes biome
Available Versions
How to Install Nether Expansion on Your Server
Order Server
Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).
Set neoforge Loader
In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.8).
Install Mod
Open the mod browser in the dashboard and search for "Nether Expansion". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.8, 1.21.7, 1.21.4
Server-side
✓ RequiredRecommended RAM
6 GB(min. 4 GB)Frequently Asked Questions
Nether Expansion server crashes on startup – what to do?
Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.21.8). You can switch loaders with one click in the panel.
Is Nether Expansion compatible with neoforge?
Nether Expansion officially supports neoforge for Minecraft 1.21.8, 1.21.7, 1.21.4. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Nether Expansion – how to optimize performance?
Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Nether Expansion consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Nether Expansion with just one click on your server.