Radial Aggro Indicator

When a mob first targets the player, a red radial indicator appears at the edge of the screen and points toward that mob. Several indicators appear together when several mobs have targeted the player at once. Each indicator stays for a set number of ticks, 200 by default, which is about 10 seconds, then fades out. Mobs that are inside the player's field of view are hidden by default, so only threats behind or beside the player are marked.

The indicator is set up in the config file. Server owners and players can change its color, size, symbol and distance from the center of the screen, and can switch the visibility rules on or off. Entity tags let a pack adjust behavior for specific mobs: one tag keeps an indicator visible indefinitely instead of letting it disappear, and another stops a mob from showing an indicator at all. A configuration option inverts that blacklist into a whitelist, so only tagged mobs show an indicator.

The mod is published for Forge and NeoForge across four game versions, 1.20.1 – 26.1.2, and is released under the MIT License, but it is not open source. Every player and the server need a copy of the mod. Forge files cover 1.20.1 and NeoForge files cover 26.1.2, with 1.0.1 as the latest Forge file and 4.0.0 as the latest NeoForge file on the beta channel.