SleepLess

SleepLess tracks a sleep debt value for every player. Sleeping through enough of the night pays the debt down, while staying awake lets it grow. The amount gained or lost scales with how many hours were slept, so a full night clears most of it and skipping several nights builds a heavy load. The maximum values for gain and loss are configurable, and the effects list shows which effects are active at each level.

As debt rises, the effects grow more noticeable: hunger drains faster, walking and mining slow down, drowning comes sooner, and the world looks and sounds different. Fog gets denser and closer, lights dim, colors lose saturation, and ambient sounds play at a rising rate while the sounds themselves become quieter. Heavy breathing can change the field of view, though that option is disabled by default. At high debt, players can see phantom entities and be attacked by them, and night terrors add to the effect.

The mod is written for Forge 1.12.2 and runs on client and server, so both the server and each player need it. It is released under the MIT License, is open source, and requires MixinBooter and The Impossible Library. The first version was published on 2023-11-02 and the latest file, 0.1.0 for 1.12.2, is in the beta channel.