

This procedure was referred to as building a "full head of steam." The phrase has also come to describe any significant amount of driving force or momentum. It was necessary to exceed a certain threshold of pressure in the boiler before the engine could be operated.

The name of this hat references the practice of preparing a steam engine for operation.When the Spy uses Your Eternal Reward to backstab a player wearing this hat, the disguise does not wear the hat.When the Sniper taunts with a melee weapon while wearing this item, he does not take off the hat.Renamed the Full Head Of Steam to Full Head of Steam.The Full Head of Steam now appears as a proper name with "The" prefixed.The Full Head of Steam was added to the game.Achieve 7 of the achievements in the Foundry pack.
