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. They are wrapped around the Engineer's hard hat, and powered by an attached battery pack located on the back of the hat.
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.