Metal Hat

Metal Hat is an option in Completing the Mission during the "Free Man" ending.

Henry can use the hat to escape his prison cell on board the Toppat Orbital Station. When chosen, Henry puts on the hat, and completely turns to metal. He becomes invulnerable, and his strength greatly increases. With a few punches, he breaks through the locked door, knocking out Holey Cap who was standing guard on the other side, and makes a run for it, with bullets bouncing off of him.

However, the transformation wears off when he reaches Armory 7, forcing him to seek shelter there.

Trivia

 * The Metal Hat is a direct reference to Super Mario 64, a power up where Mario would become metallic and "invincible" when wearing it.
 * The music that plays while Henry is wearing the hat is similar to the Metal Cap theme from Super Mario 64, But it's a composition from Puff instead of Koji Kondo's music straight from the game to avoid a DMCA from Nintendo.

Music that plays when Henry Stickmin wears the hat.