Now I've seen everything!
— The Engineer on the Pyro's cranial companion
The Triboniophorus Tyrannus (/'traɪ,boʊniːoʊ,fɔərʌs/ /taɪ,rænʌs/ treye-boh-nee-oh-foh-russ teye-ran-uss) is a community-created cosmetic item for the Pyro. It is a gelatinous green slug with beady gloss black eyes, placed off-center atop the Pyro's gas mask-burnished head.
The item's description was written by crushilista for the Hat Describing Contest.
When players equipped with this item kill an enemy unassisted by another player, the killfeed shows everyone in Pyroland that the item gets the kill instead, with its custom name if it has one, and the player gets credited with the assist.
- The Triboniophorus Tyrannus was added to the game.
- The Triboniophorus Tyrannus was made craftable.
September 30, 2010 Patch (Mann-Conomy Update)
- The Triboniophorus Tyrannus was made paintable.
- [Undocumented] Added a community-contributed description for the Triboniophorus Tyrannus.
- [Undocumented] The Triboniophorus Tyrannus can now be uncrated with Unusual quality.
October 27, 2010 Patch (Scream Fortress Update)
- [Undocumented] Added the Triboniophorus Tyrannus to the Mann Co. Store.
- The Triboniophorus Tyrannus' painting texture was improved.
- [Undocumented] The Triboniophorus Tyrannus now makes squishing noises when moved in the backpack.
June 27, 2012 Patch (Pyromania Update)
- [Undocumented] The Triboniophorus Tyrannus is now credited as being assisted by the player on unassisted kills.
- Triboniophorus is a genus of green slug native to Australia. "Tyrannus" is Latin for "tyrant/despot". The item name can thus be translated from New Latin as "the tyrant slug".
- This item appears on page 2 of the True Meaning comic, wearing a B.M.O.C.
An X-Ray of the Pyro with the Triboniophorus Tyrannus on top, as seen in BLU Alien biology lab on 2Fort Invasion map.