The Arachno-Arsonist is a community-created cosmetic item for the Pyro. It replaces the Pyro's head with the dark-brown head of a spider, with the fur around eyes being a bit darker than the rest of the head. The spider's fangs, or chelicerae, wiggle with the player's movements.
The Arachno-Arsonist was contributed to the Steam Workshop.
- The Arachno-Arsonist was added to the game.
- Rarely, the fangs float off of the head or face the wrong way.
- The prefix "Arachno" refers to the taxonomic class "Arachnida" to which spiders belong.