In Hell is Us, you’ll find mysterious doors locked with a symbol-based code. These are known as Vaults of Forbidden Knowledge, and when unlocked, they will reward you with numerous rewards. There are six in total scattered around Hadea, each with its own code. Hand over the research items to Tania in the APC to unlock their codes. Read on to find out where to find the Vault of Knowledge, how to obtain the code, and what rewards you will get for opening it.
The Vault Codes are unlocked by handing over research items to Tania in the APC.
Table of Contents¶
If you want to jump to a specific section, click on the links below.
| Quickjump |
|---|
| Vault of the Copse |
| Vault Of The Mire |
| Vault of the Knoll |
| Vault of the Mere |
| Vault of the Prairie |
| Vault Of The Beck |
Vault of the Copse - Senedra Forest¶
The first Vault is located in the Senedra Forest, next to the Field Camp. You’ll need to come here early in the story to find the Medkit to get the key for the APC. If you’re coming back here, simply run into the forest to the left of the APC, and follow the X’s marked on the trees. Once you arrive at the field camp (tent), go behind it and look at the western wall. There will be a small cave here that leads to the Vault.
From the APC, follow the X’s on the trees to find the Field Camp. Behind it is a cave.
Follow the cave to the end to find the Vault.
Vault of the Copse Code¶
You can unlock the Vault by selecting these symbols in the order that they are shown.
Select these symbols in the same order from left to right.
Vault of the Copse Rewards¶
Inside the Vault, you’ll obtain the following items.
| Type | Item | Notes |
|---|---|---|
| Exploration Item |  Amine Prism - Sigma |
Used to close Sigma Timeloops |
| Misc Item |  Letter - To Rosetta |
A note about the origin of the demons and the time portal anomalies |
| Misc Item |  Parchment - Preparations |
A note about the construction of a strange, large contraption |
| Misc Item |  Tome - A Bitter Triumph |
Clues about closing Timeloops |
| Glyph | Overwhelm | Grief, Mechanic: Charge, Lock on: No, Cost: 200, Radius: 5m,7.5m,10m, Pushback: 10M, Power: Grief energy gathers and discharges around you, overwhelming nearby Lymbic Entities and stunning them |
| Glyph | Gluttony | Ecstasy, Mechanic: Tap, Lock on: No, Cost: 150, Stun Duration: 2 seconds, Attraction Radius: 15m, Power: A deep yearning discharges a vortex drawing in all Lymbic Entities into melee range and stunning them upon arrival |
| Glyph | Feed on Fear | Terror, Mechanic: Hold, Lock on: Yes, Cost: 30/s, Healing: 232/sec, Damage: 63/sec, Power: You create a link of pure fear between you and the target Entity, siphoning vitality from its terrified state |
Vault Of The Mire - Acasa Marshes¶
Although this Vault is in the Acasa Marshes, you won’t be able to access it until you obtain the second Keystone in Act 2 (unless you know the gate code). The reason for this is that it is locked behind the Observation Outpost to the northeast of Jova, which requires a code to open its gates. Normally, you’ll get the code after a scene in Act 2, telling you to check under the seat in the APC for the code. The Outpost is easier to reach by heading northeast from the Blacksmith, past the ON building, and down the stairs.
The code to the gate for us was 151991, which should be the same for you; if it isn’t, you’ll need to check the 
APC Code Sheet obtained via the methods above to obtain it. Upon opening the gate, defeat the enemies and loot the initial area to complete the Outpost Mystery, and then follow the path around until you can go into a cave to your left. The Vault will be at the back of the cave.
Vault Of The Mire Code¶
You can unlock the Vault by selecting these symbols in the order that they are shown.
Select these symbols in the same order from left to right.
Vault Of The Mire Rewards¶
Inside the Vault, you’ll obtain the following items.
| Type | Item | Notes |
|---|---|---|
| Misc Item |  Parchment - A Grand Stratagem |
An ancient parchment discussing the creation of a new celebration |
| Misc Item |  Parchment - Penance |
An ancient parchment expressing concern for a contrite colleague |
| Misc Item |  Tome - The Endless Horror |
Recounting horrors discovered within the anomalies |
| Misc Item |  Tome - Anson Lingen, The Wandering Mason |
A tome about Anson Lingen, who reshaped Hadea |
| Weapon |  Twin Axes of Ecstasy |
Grade: 4 Level: 15 |
| Weapon |  Sword of Grief |
Grade: 4 Level: 15 |
| Weapon |  Greatsword of Rage |
Grade: 4 Level: 15 |
| Weapon |  Polearm of Terror |
Grade: 4 Level: 15 |
| Relic (Active) |  Heart of the Griffon |
Mechanic: Tap, Lock-On: No, Cooldown: 6:00, Endurance Restoration: 100%, Lymbic Restoration: 100%, Power: Timeless Rejuvenation - Find yourself born anew with Health, Stamina, and Lymbic Energy fully restored |
Vault of the Knoll - Vyssa Hills¶
The Vyssa Hills Vault is a sneaky one. From the APC (if you haven’t completed the area), follow the rocky wall northwest until you reach the waterfall. Go up the slope around the waterfall and look down to the west. Drop to the rocks below to go behind the waterfall and follow the long cave to the Vault. If your APC has moved, simply drop off the ledge in front of you and head south.
From the APC, follow the wall on your left to find a waterfall. Go around the slope in front and drop on the rocks below the waterfall.
Go through the waterfall and follow the path to find the Vault.
Vault of the Knoll Code¶
You can unlock the Vault by selecting these symbols in the order that they are shown.
Select these symbols in the same order from left to right.
Vault of the Knoll Rewards¶
Inside the Vault, you’ll obtain the following items.
| Type | Item | Notes |
|---|---|---|
| Misc Item |  Painting - Lady Marguerith |
A faded paining depicting Lady Maguerith, Mother of Aargau |
| Misc Item |  Parchment - Anticipation |
An ancient parchment describing the anticipation felt nearing the completion of a grand project |
| Misc Item |  Letter - A Spy’s Insight |
An ancient letter reporting progress on the search for Auriga Museum |
| Misc Item | Tome - The Endless Horror |
Recounting horrors discovered within the anomalies |
| Misc Item | Tome - Anson Lingen, The Wandering Mason |
A tome about Anson Lingen, who reshaped Hadea |
| Glyph | Void - Enhanced | Grief, Rank 2,** Mechanic:** Set and Trigger, Lock-On: No, Cost: 188, Passive Damage: 90/sec, Explosion Damage: 170/sec, Power: Spawn a pool, eroding Entities within it. You can collapse it for greater damage |
| Glyph | Animosity - Enhanced | Rage, Rank 2, Mechanic: Tap, Lock-On: Yes, Cost: 97, Stun Duration: 3 sec, Power: Lasso an enemy and pull them back to you in melee range, stunning them too |
| Glyph | Rapture - Enhanced | Ecstasy, Rank 2, Mechanic: Charge, Lock-On: No, Cost: 156,** Damage:** 380/770/1,280, Explosion Radius: 5m/7.5.10m, Power: Energy swells around you and erupts that damage all nearby Lymbic Entities |
| Defensive Gear |  Pendant of Ecstasy - Battle Bliss |
Ecstasy, Grade 2, Damage Absorption: 10%, Endurance Bonus: +1000, Protection Bonus: +15%, Duration: 5 sec, Power: While grievously wounded, strikes against you will reduce the damage you take |
| Relic (Passive) |  The Unbound Delusion |
Melee Damage: -25%, Lymbic Bar Size: +100%, Power: Madman’s Essence - Unfetter your mind, increasing Lymbic Energy but reducing damage |
Vault of the Mere - Lake Cynon¶
This is one of the easier Vaults to find. When you arrive in Lake Cynon, follow the path east and go down the stairs. Head northeast toward the pier and then follow the narrow path southeast. At the end, you’ll find a cave to your right. Follow the cave to the end to find the Vault.
Vault of the Mere Code¶
You can unlock the Vault by selecting these symbols in the order that they are shown.
Select these symbols in the same order from left to right.
Vault of the Mere Rewards¶
Inside the Vault, you’ll obtain the following items.
| Type | Item | Notes |
|---|---|---|
| Misc Item |  Parchment - A Dire Cost |
An ancient parchment describing the anticipation felt nearing the completion of a grand project |
| Misc Item |  Painting - Scion Namir Adam |
A faded painting depicting Scion Namir Adam, Mantle of Sorrow, Fifth Tear |
| Misc Item | Tome - The Ascendance of the Hellion Lodges and the Birth of Lymbic Aesthetics, Part 1 | Recounting the establishment of the Hellion Lodge |
| Consumable |  Tuning Stone - Steady |
Experience Bonus + 1500 |
| Exploration Item |  Amine Prism - Theta |
Used in the closing of Theta Timeloops |
| Glyph | Frightful Ambush - Elite | Terror, Rank 3, Mechanic: Set and Trigger, Lock-On: No, Cost: 290, Damage: 2390, Explosion Radius: 15m, Power: You spawn a pool of pure terror energy that can be activated at will, leaving the seized Lymbic Entities in dreadful pain |
| Glyph | Masochistic Delight - Elite | Ecstasy, Rank 3, Mechanic: Tap, Lock-On: No, Cost: 220, Damage: 3860, Radius: 15m, Power: You revel in ecstatic pain as you willingly inflict damage upon yourself and share the blissful agony with all nearby Lymbic Entities |
| Glyph | Waves of Grief - Elite | Grief, Rank 3, Mechanic: Hold, Lock-On: No, Cost: 45/s, Damage: 240/s, Range: 15m, Power: Endless waves of grief energy spill out of your weapon, tormenting Lymbic Entities with heavy sorrow |
| Glyph | Rage Spike - Elite | Rage, Rank 3, Mechanic: Tap, Lock-On: No, Cost: 290, Damage: 2410, Explosion Radius: 10m, Power: A pointed lance of calcified rage erupts from your weapon and blazes toward your target, detonating upon impact |
| Relic (Active) |  Orison of Valour |
Mechanic: Tap, Lock on: No, Cooldown: 9:00, Stamina Cost Reduction: 100%, Duration: 30 sec, Power: Supreme Moxie - Become unfettered by the exertion of combat, removing Stamina costs for all actions |
Vault of the Prairie - Jeljin¶
This Vault is located in the archaeological dig site in Jeljin. From the APC, head south until you reach the fence, and then follow the path west, down the stairs. To your left, you’ll see a tent; this is where you want to go, but you’ll have to go around. Continue west and go around the corner to the south. Go through the gap in the fence to the east and follow the path around to the tent. Next to the tent is another tent. Head inside to find a save point and a cave leading to the dig site. Go down the stairs and follow the path west to find the Vault.
Vault of the Prairie Code¶
You can unlock the Vault by selecting these symbols in the order that they are shown.
Select these symbols in the same order from left to right.
Vault of the Prairie Rewards¶
Inside the Vault, you’ll obtain the following items.
| Type | Item | Notes |
|---|---|---|
| Misc Item |  Parchment - Vanished |
An ancient parchment expressing disbelief at a confusing disappearance |
| Misc Item |  Tome - The Silent Safeguard |
A Tome speaking about a secret safeguard set in place |
| Misc Item | Tome - The Ascendance of the Hellion Lodges and the Birth of Lymbic Aesthetics, Part 2 | Recounting the establishment of the Hellion Lodges |
| Weapon |  Twin Axes of Terror |
Grade: 3 Level: 10 |
| Weapon |  Greatsword of Ecstasy |
Grade: 3 Level: 10 |
| Weapon |  Sword of Rage |
Grade: 3 Level: 10 |
| Weapon |  Polearm of Grief |
Grade: 3 Level: 10 |
| Relic (Active) |  Chalice of Everflowing Turmoil |
Mechanic: Tap, Lock on: Yes, Cooldown: 6:00, Lymbic Drain: 30/s, Duration: 20 sec, Power: Lymbic Glut - Siphon an enemy’s Lymbic Energy to refill your own |
Vault of The Beck - Marastan¶
From the APC, follow the path forward and take the next path to the south, which will take you to some large ruins. Go around the outer edge of the ruin, to the right, and you’ll find a small island to your right. Go across behind the mountain to find a cave; follow the path to the end to find the Vault.
(1 of 3) From the APC, take the path to your left until you reach the ruins. Go around the right of the ruins to find a small island.
Vault of The Beck Code¶
You can unlock the Vault by selecting these symbols in the order that they are shown.
Code5.jpg
Vault of The Beck Rewards¶
Inside the Vault, you’ll obtain the following items.
| Type | Item | Notes |
|---|---|---|
| Exploration Item |  Amine Prism - Rho |
Used to close Rho Timeloops |
| Misc Item |  Parchment - Regret |
An ancient parchment lamenting mistakes made in the pursuit of wisdom |
| Misc Item |  Painting - Queen Raveta |
A faded painting depicting Queen Harvor Raveta, Wrath of Palom |
| Misc Item | Tome - The Ascendance of the Hellion Lodges and the Birth of Lymbic Aesthetics, Part 3 | Recounting the establishment of the Hellion Lodge |
| Consumable | Tuning Stone - Steady |
Experience Bonus + 1500 |
| Exploration Item | Amine Prism - Theta |
Used in the closing of Theta Timeloops |
| Glyph | Frightful Ambush - Elite | Grade: 4 Level: 15 |
| Glyph | Lymbic Slivers - Elite | Grade: 4 Level: 15 |
| Weapon | Greatsword of Rage |
Grade: 4 Level: 15 |
| Weapon | Polearm of Terror |
Grade: 4 Level: 15 |
| Relic (Active) |  Memoria of the Phol |
Mechanic: Tap, Lock on: No, Cooldown: 9:00, Exp Bonus: +100%, Duration: 600 sec, Power: Echoes of War - Your weapon resonates with the frequencies of past battles, increasing their experience gained |
That’s it for all the Vaults of Knowledge. If you want to work out the codes yourself, you’ll need to research a lot of items by speaking to Tania in the APC. Once you’ve completed a log, you’ll receive the code.
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