Hell is Us includes 6 Vaults of Forbidden Knowledge. Opening one Vault is required for the trophy/achievement Vault Raider, but all must be opened eventually for items required for other trophies/achievements.
Vaults are locked hidden rooms that contain Relics, Glyphs, weapons, and lore items. You learn the solution for the door and a hint at the Vault location when turning in Research Items with Tania, but the solution isn’t random so you can go to the location and open the Vault at any time as long as you have access to the area it is in.
None of the Vaults are missable, so can all be opened after the story.
If you want to complete all Mysteries as you progress you can follow the Hell is Us Collectible Walkthrough and you’ll get all trophies in 1 playthrough. It includes all trophies, collectibles, missables, and explains how to advance the story objectives.
Vaults of Forbidden Knowledge
Vaults are listed in the order they appear in the Research – Vaults of Forbidden Knowledge menu. This is the same order that you receive the clues for them from Tania when turning in a certain amount of Research Items. You can tell if you have already opened in this menu if they display an opened door icon, but if you open a Vault before you gain the information about it from Tania it won’t appear in this menu.
#1 – Vault of the Copse: Senedra Forest
From the APC go west up the hill to the OMSIF camp you went to at the start of the game. Behind the tent is a cave you can walk into where you can find the vault door.
Open it by changing the dials to: Terror symbol, figure 8, Rage symbol, Circle with Spikes
Contains:
- Glyph: Gluttony
- Glyph: Overwhelm
- Glyph: Feed on Fear
- Glyph: Wave of Wrath
- Amine Prism – Sigma
- Tome – A Bitter Triumph
- Letter – To Rosetta
- Parchment – Preparations
#2 – Vault of the Knoll: Vyssa Hills
From the APC go east back into the main area, then follow the cliff to where you are above the waterfall near the stone ruins. You need to drop to the middle level of the waterfall from the upper ledge where you can find the vault door.
Turn the dials so that they are the following: figure 8, circle with 4 spikes, Ecstasy symbol, Rage, symbol
Contains:
- Relic: The Unbound Delusion.
- Glyph: Void – Enhanced
- Glyph: Animosity – Enhanced
- Glyph: Rapture – Enhanced
- Defensive Gear: Pendant of Ecstasy – Battle Bliss
- Painting – Lady Marguerith
- Letter – A Spy’s Insight
- Parchment – Anticipation.
#3 – Vault of the Mere: Lake Cynon
From the APC follow the path down toward the lake, then go southeast along the shore where you can find a cave, with the vault door at the back.
Enter the following symbols: Eye, Grief symbol, U, Ecstasy symbol
Contains:
- Relic: Memoria of the Phol
- Glyph: Perfect Guard – Elite
- Glyph: Lymbic Slivers – Elite
- Amine Prism – Thetha
- 5 x Tuning Stone – Steady
- Parchment – A Dire Cost
- Painting – Scion Namir Adam
- Tome – The Ascendance of Hellion Lodges and Birth of Lymbic Aesthetics, Part 1.
#4 – Vault of the Prairie: Jeljin
Go southwest from the APC toward the dig site, then down to the first level. Directly past the circular puzzle door you can find the vault door.
Turn the dials so that they are the following: Grief symbol, U, eye, Terror symbol
Contains:
- Relic: Chalice of Everflowing Turmoil
- Twin Axes of Terror
- Greatsword of Rage
- Polearm of Grief
- Greatsword of Ecstasy
- Tome – The Ascendance of Hellion Lodges and the Birth of Lymbic Aesthetics, Past 2
- Tome – The Silent Safeguard
- Parchment – Vanished
#5 – Vault of the Beck: Marastan
From the APC go to the southeast in the ruins area. Go around back past the ruins and into the cave with the tunnel leading to their center. In the tunnel you can find the vault door.
Change the dials to: Circle with spikes, Eye, Figure 8, U
Contains:
- Relic: Orison of Valour
- Glyph: Frightful Ambush – Elite
- Glyph: Rage Spike – Elite
- Glyph: Waves of Grief – Elite
- Glyph: Masochistic Delight – Elite
- Amine Prism – Rho
- Tome – The Ascendance of Hellion Lodges and the Birth of Lymbic Aesthetics, Part 3
- Parchment – Regret
- Painting – Queen Raveta
#6 – Vault of the Mire: Acasa Marshes
Go northeast of Jova back to the OMSIF camp (opened with Mystery #9: Observation Outpost 08), then around the back to the cave.
Change the dials to the following: Rage symbol, Ecstasy symbol, Terror symbol, Grief symbol
Contains:
- Relic: Heart of the Griffon
- Greatsword of Rage
- Twin Axes of Ecstasy
- Sword of Grief
- Polearm of Terror
- 5 x Tuning Stone – Strong
- Parchment – Penance
- Parchment – A Grand Stratagem
- Tome – Anson Lingen, The Wandering Mason
- Tome – The Endless Horror
For all other Collectible Types refer to Hell Is Us Collectible Guide.
