Surge

Surge changes how the world behaves during survival. Earthquakes shake the ground and can collapse mines, caves turn into dangerous pockets, and a single spark can spread fire through an entire forest. Thunderstorms make mobs stronger, and darkness reduces how far a player can see, with monsters tending to come closer whenever whispers are heard.

Player condition matters as well. Running, jumping and fighting all build fatigue, tools break instead of vanishing, repairing them lowers their maximum durability, and raw meat spoils in the inventory. Sleeping near monsters can bring on nightmares. Every mechanic can be adjusted, and a config file allows any of them to be disabled. The mod is built for NeoForge and is published only for 1.21.1; files are listed as alpha builds, and the code is not open source, as the mod is released under All rights reserved.