On Steam's list of recently updated games, I was surprised to see a banner for a Hat in Time which said "Featuring special content from Psychonauts 2"
I've played through a large amount of A Hat in Time, but I never saw any content from Psychonauts. The closest thing I could find was an easter egg of Raz's body outlined on the floor, but that's hardly enough to warrant advertisement.
Why does the Steam store say A Hat In Time features content from Psychonauts 2?