Psychonauts

Missable

There are a total of six golden helmets in the game, with one being very easily missable. Obtaining a golden helmet will add to the number of Astral Layers (lives) you will have, here is a list of all the golden helmets and where you can find them:

Brain Tumbler Experiment: Behind the thorn tower found during your second visit

Lungfishopolis: On top of a skyscraper after the Monorail Tunnel.

The Milkman Conspiracy: You need the telephone to obtain this helmet, on the island accessible from the telephone pole after the road crew.

Waterloo World: On the pink bridge near the peasant who is unarmed.

Black Velvetopia #1: Hang the window painting obtained from the dalmatian artist on the upper ledge at end of the of an alley near the Queen of Diamond entrance, enter the newly created window.

Black Velvetopia #2 (Missable): This helmet can be missed if you complete Black Velvetopia. Get the confusion grenade merit badge and use it to temporarily stop the bull so the dog can paint the poster on the wall, return to Dingo Inflagrante for your reward.

Obtain all of the above helmets for the trophy to unlock.