Nomenicide (nomen = name, -cide = killing) is a social deduction SMP plugin for Paper 26.1+ that turns your Minecraft server into a paranoid murder mystery. Every player joins with the same name, same skin, no nametag — total anonymity. The only way to eliminate someone is pure detective work: figure out who they really are, rename a weapon to their exact real username at an anvil, and kill them with it. Right name = permanent ban. Wrong name = they respawn, and now they know someone is hunting them.

🎮 Perfect For:

🎥 Streamers & YouTube SMP series – built-in drama: betrayals, wrong guesses, thunder-crack reveals. An Among Us-style traitor hunt inside survival Minecraft
🕵️ Hardcore & lifesteal-style communities – real stakes: get discovered, get banned
👥 Friend groups & private SMPs – the ultimate whodunit with people who know each other's playstyles
🧩 Custom gamemode servers – a complete, self-contained social deduction experience in one small jar

⚙️ Features:

Total Anonymity – Everyone is literally named Player with the same Steve skin: in the tab list, above their head, in chat, even in the client's name autocomplete. Powered by login-profile masking — no ProtocolLib, no NickAPI.
Assassination Death-Ban – Rename a sword to a player's exact real username and land the kill. Correct guess: they're banned (permanent or timed — your choice) with a server-wide announcement. Wrong guess: they respawn and the killer is told they missed.
Identity Reveal Events – On a configurable timer, one random player is dramatically exposed: ⚡ thunder, an on-screen title, glowing outline, and their real name in the tab list. The glow can't be milked away, and they can't escape by logging out — one short grace window, then a ban. Their items still drop where they fled.
Combat-Log Ban – PvP tags both fighters with a live action-bar countdown (⚔ In combat: 14s ⚔). Logging out while tagged kills the leaver — items drop on the spot — and bans them. Dying honestly clears the tag.
Leak-Proof Chat & Messages – Chat shows Player: <message>. Join/quit, death messages, and advancement broadcasts are all rewritten. Identity-leaking commands (/msg, /list, …) are blocked and hidden from the client's command tree.
New-Player Protection – Fresh joins can't be death-banned for a configurable window, so nobody gets name-sniped at spawn.
In-Game Tutorial – /nomenicide tutorial teaches the rules to anyone who asks. Every line is editable.
Admin Toolkit – /nomenicide who (click a name to teleport), reveal, endreveal, set/get for editing any config option in-game with tab completion, status, reload. Aliases: /nomen, /nmc.

Config File – One commented config.yml covers everything:

mask-name: "Player"
assassination:
  ban-duration-hours: -1     # -1 = permanent
  case-sensitive: false
  new-player-protection-minutes: 0
combat-log:
  tag-seconds: 15
reveal-event:
  interval-minutes: 60
  duration-minutes: 10
  leave-grace-seconds: 30
  dramatic: true             # thunder + title on reveals

💬 Trust no one. Watch how they build, how they fight, how they type. Then write a name on a sword and find out if you were right.

🛠️ Tech Details:

Paper 26.1.x / 26.2.x server plugin (Paper-only API — Spigot is not supported), Java 25+
Zero hard dependencies – no ProtocolLib, no metrics, no network calls; one ~54 KB jar
PlaceholderAPI supported (optional): %nomenicide_realname%, %nomenicide_maskname%, %nomenicide_revealed%, %nomenicide_masked%
Masking is presentation-only server-side: UUIDs stay real, so LuckPerms, CoreProtect and friends keep working
Console logs who is behind each mask — admins always have the full picture
📜 License: MIT — free for any server, including commercial ones