The 工程头盔 is a 时装 item equipped on the Social Helmet Slot. It is purchased from the 机械师 for 1 .
- This helmet resembles a real-life hard hat, which is a piece of safety gear worn by workers on a jobsite to protect themselves from falling objects. If an engineer were present on a jobsite they would be required to wear a hard hat as well.
- The Engineering Helmet is most likely a reference to the Engineer from Valve's Team Fortress 2, due to their extreme visual similarities and usage of similar clothing in the 1.3.1 spoilers.