Single Biome Challenge

When a world is generated, the player picks one biome, and terrain for the overworld, Nether and End follows that choice. Cave and surface generation are set to match, and the mod adjusts terrain so each dimension still feels right, with a rocky Nether and a void-like End that carry the biome theme through. The option appears on the world creation screen.

Each dimension can be locked behind custom requirements that must be completed before entry. Requirement types include collecting a number of items in the inventory, holding a number of a block, killing a set count of a mob, and finding a structure such as a village. A hidden requirement list shows once single biome mode is active, and the rules are meant to prevent progression paradoxes where a player cannot reach what they need. Operators can choose to start players in the Nether or the End instead of the Overworld, with an automatic safe spawn point calculated for spawn and respawn.

A cheat mode lets creative players and server operators mark requirements complete by a config option, which is useful for testing or for rewarding players through other means. The mod is a NeoForge build for Minecraft 26.1.2, published as version 1.1.0. It is client and server, so the server and every player need it. It is released under All rights reserved and is not open source.