This plugin if for paper servers of the specific version.

Overall Experience:

Features

• Identity Removal
• All players share the same forced skin.
• Nametags are hidden, and the tab list shows “?” for everyone.
• Chat names are blank.
• Silence & Isolation
• All chat is disabled.
• Messaging commands like /msg, /tell, /w, /r, /me, and /emote are blocked.
• Players hear “You yell but only echoes return…” when attempting to speak.
• Survival Restrictions
• Natural regeneration is disabled.
• No death messages; all players hear a wither-spawn sound when someone dies.
• Inventory Limits
• Helmets, chestplates, leggings, books, and signs are automatically removed.
• Boots and shields are allowed.
• Visual Enforcement
• A repeating task re-applies skins, restrictions, and nametag hiding to prevent bypassing.

FearMode creates an environment where:

• No one can communicate.
• No one can identify anyone.
• No one can heal naturally.
• No deaths or advancements are ever announced.
• Everyone looks identical.
• Armor is stripped away except for boots.
• Every death is felt through ominous sound cues.

It’s a perfect mode for:

• Horror servers
• Psychological survival challenges
• Hardcore events
• Custom minigames
• ARG-style experiences