Hats

In Good Robot hats are your most invaluable and stylish accessory. Wearing a hat grants damage immunity to the first projectile, enemy or explosion to hit your robot. After taking damage the hat will fall off and lodge into the first ground it touches, including the ceiling if Good Robot is near it. Touching a "?" box will also knock the hat off, even though it does 0 damage. Entering any zone presents you with a shop that allows you to buy a new hat (replacing your current one, if any).

Types
As of Update 1 there are 18 different hats to pick from.

Achievements
There are 6 hat related achievements that vary in difficulty from simply purchasing a hat, all the way to completing the game with your first purchased hat. As of 12th April 2016 nobody has verifiably completed the Hardest Hat achievement and a bounty has been placed on it by the developer. If the achievement is met and can be verified the developer will (with some conditions) reward the player with free swag including the Pyrodactyl Complete Pack and a range of physical goods.