Extra Biomes
by LAirHisson
Extra Biomes adds two new biomes to NeoForge worlds, a toxic uranium biome and a sugary candy biome, each with its own creatures and blocks.
What it does
The uranium biome is post-apocalyptic: it holds uranium ore, radioactive sugar and mutant versions of ordinary animals, such as two-headed pigs and long-legged cows. Crafting a nuclear bomb and detonating it reshapes the surrounding terrain. Radiation armor protects a player from the deadly radiation effects found in that biome.
The candy biome is a colorful landscape of sugar blocks, chocolate rock formations and rainbows, with many blocks that are edible. It is paired with new mobs: a sticky, bouncy Sugar Slime and the Candy Mage, a caster that uses sugary spells.
Extra Biomes is an NeoForge mod for 1.21.1 – 1.21.5, released under the MIT License. It is not open source. Client and server both need the mod, so every player on a server that runs it must install it too.
Key features
Uranium biome
A toxic biome with uranium ore, radioactive sugar and a dangerous resource that can be gathered for crafting.
Nuclear bomb
A craftable bomb that produces a massive explosion and reshapes the terrain around it when detonated.
Radiation armor
Armor pieces that guard against the radiation effects present in the uranium biome while exploring.
Mutant mobs
Twisted versions of normal animals, including two-headed pigs and long-legged cows, found in the uranium biome.
Candy biome
A landscape of sugar blocks, chocolate rock formations and rainbows, with many blocks that can be eaten.
Candy mage
A mysterious caster that fights with sugary spells, added alongside the Sugar Slime.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Survival exploration
Players can travel into the toxic biome, gather uranium and prepare radiation armor before entering.
Sweet adventures
The candy biome gives players a bright, edible environment to explore and build in.
Who it’s for: Players who want two additional biomes with their own creatures and blocks on NeoForge 1.21.1 – 1.21.5, and server owners who want to offer those biomes to every player.
How it compares
Sweet Blocks is a client and server mod for 1.21.8 only, licensed as All rights reserved and not open source. Bomb add on needs both client and server for 1.21.4 – 1.21.8 and is also not open source under All rights reserved, so it covers the nuclear side differently.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Extra Biomes | NeoForge | 1.21.1 – 1.21.5 | Client and server | 2025-04-13 |
| Sweet Blocks | NeoForge | 1.21.8 | Client and server | 2026-05-03 |
| Bomb add on | NeoForge | 1.21.4 – 1.21.8 | Client and server | 2025-08-31 |
Questions
Does Extra Biomes need to be installed on the server?
Which game versions does Extra Biomes support?
Do players need the radiation armor to enter the uranium biome?
In the catalog
Extra Biomes is one of 8,515 World generation mods on ModsFinder, and one of 4,175 World generation mods for NeoForge. 15,307 mods support Minecraft 1.21.5.
More from LAirHisson
Similar mods
What the author says
This mod adds two brand-new biomes to Minecraft, each with its own unique style, creatures, and gameplay mechanics — from post-apocalyptic survival to sweet adventures! Enter a toxic biome filled with uranium, dangerous radiation, and some mutant mobs.
Official listing
- Modrinth page
- modrinth.com/mod/extra-biomes
- Owner
- LAirHisson
- Published
- 2025-04-13
- Updated on Modrinth
- 2025-04-13
- Facts verified
- 2026-10-15