That there wasn't gettin' any lighter.
— The Engineer on his illuminated headpiece
The Industrial Festivizer is a community-created cosmetic item for the Engineer. It is a string of yellow, green, purple and team-colored Christmas lights wrapped around the Engineer's hard hat and powered by a battery attached to the back.
December 17, 2010 Patch (Australian Christmas)
- The Industrial Festivizer was added to the game.
December 21, 2010 Patch
August 18, 2011 Patch
- [Undocumented] Fixed the texture so that it no longer appears all-white or all-black under certain lighting.
September 15, 2011 Patch
- Fixed the Industrial Festivizer sometimes turning white.
- [Undocumented] Fixed the Industrial Festivizer not glowing in the dark.