Where are the Hell Is Us Vaults of Forbidden Knowledge? There are more mysteries than you can shake a stick at in Hell Is Useveryone needs something, there is seldom a door that isnt already locked, and occasionally, youll get a lead on a special vault that contains, well, forbidden knowledge.Knowledge is power in Hell Is Us, but youre going to have to work for it. For instance, knowing the Vitalis house code gives you access to the blacksmith, allowing you to upgrade your weapons. Vaults of Forbidden Knowledgeare another source of knowledge and power, and we have all the information you need here if you want to go hunting. Continue reading All Hell Is Us Vault of Forbidden Knowledge locations and rune codesMORE FROM PCGAMESN: Best open-world games, Best RPGs, Best soulslikes