Psychonauts 2 is chock full of collectibles for Raz to find, and each one is more peculiar than the last. Some of these collectibles even contain some insight into the problems of the mind Raz is exploring.
Memory vaults are a type of collectible that offers insight into supporting characters' mental states. These walking contraptions tell the story of the warped brain Raz is exploring. They add interesting details to each mind, and they're stylish to boot.
Raz can find these mobile collectibles hiding inside the minds of his targets. Some stash themselves away in broom closets, while others lounge around out in the open. It all depends on what the Memory Vaults inhabit. Raz will have to chase Memory Vaults down and destroy them using his psychic abilities to unlock these collectibles.
Players can open up Raz's journal and select the world he's currently visiting to check and see if a level has a Memory Vault. Each of the level's collectibles is shown on the following page, including the Memory Vaults.
For more excellent Psychonauts 2 guides, check out Psychonauts 2: Lady Luctopus Boss Guide and How to get a Spare Brain for Nick in Psychonauts 2 here on Pro Game Guides.