This guide will tell you how a Hell is Us Vault of Forbidden Knowledge works and how to find the combination code you need to open it.
How Vaults of Forbidden Knowledge Work in Hell is Us
A Hell is Us Vault of Forbidden Knowledge is a sealed room that is typically filled with lore items, Glyphs, Relics, and occasionally, weapons. Unfortunately, each Vault is secured with a four-symbol combination lock, and getting the correct combination requires some work.
Vaults of Forbidden Knowledge are hidden throughout the world of Hadea. Simply finding them is a challenge. Once you know where to look, though, you can crack them open and get your hands on some useful treasure.
How to Unlock Vaults
You can unlock a Vault of Forbidden Knowledge by finding the Vault and inputting the correct combination code. Combinations are unlocked by successfully completing research on multiple unique items as you progress through the game.
Fortunately, the combination codes are the same for every playthrough — read on to learn where to find the Vaults we've discovered thus far along with the combination codes for them!
Hell is Us Vault of Forbidden Knowledge Codes List
| Vault | Location | Specific Directions | Code |
|---|---|---|---|
| Vault of the Copse | Senedra Forest | In a cave behind the OMSIF Camp where you retrieved the first aid kit at the start of the game. |  |
| Vault of the Knoll | Vyssa Hills | Behind the waterfall on the higher cliff in the southwest of the area. Go to the top of the waterfall then fall to the next level, there's enough ledge to land safely. Go behind the waterfall and follow the path to the door |  |
| Vault of the Mere | Lake Cynon | Follow the coastline southeast to a tunnel that leads to the door. |  |
| Vault of the Prairie | Jeljin | In the underground tunnels, in the room next to Aster's Doorway |  |
| Vault of the Beck | Marastan | Under the large ruins in the woods - use the entrance on the small island with the standing tower then follow the path to reach the door |  |
We're at the end of our Hell is Us Vault of Forbidden Knowledge Guide. Make sure to check out our other guides below!
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