Uneasy?

Among the effects, the player's footsteps echo back a moment late and at a higher volume, which can make it seem that someone is walking behind them. Cave-style ambience can also play above sea level, and sounds resembling players breathing, falling, being hurt or taking a step can be heard nearby with nobody there.

Visual effects include a hidden inventory preview, small random shifts of the camera yaw, and a brief black silhouette that appears at a distance and vanishes once looked at directly. Doors, fence gates and trapdoors can open and close outside the player's direct view, and grass near the player can turn into dirt. The mod is described by its author as a psychological horror mod, and it is meant to be played with headphones in singleplayer, since the atmosphere is said to work better alone. Its author also advises reading the spoilers section only after playing for a while.

The mod runs on the client and the server, so both the server and every player need it. Files are published for Fabric, Forge and NeoForge, with builds covering 1.16.5 – 26.2 and the latest file for 26.2. The license is All rights reserved, so the code is not open source.