Secret Room Overview
Hollow Knight: Silksong contains over 60 hidden rooms and secret areas scattered across Pharloom. These range from simple breakable wall caches to complex multi-room dungeons requiring specific ability combinations. Finding 25 of them unlocks the "Secret Keeper" achievement.
How to Find Secret Rooms
Secret rooms are hidden behind several types of concealment:
- Breakable walls — Strike walls that have slightly different textures or colors. The crack will be subtle but visible if you look carefully.
- Fake floors — Some floors can be broken by using the Dive Attack or ground pound. Look for slightly discolored tiles.
- Hidden passages — Walk through what appears to be a solid wall. These often have a slight visual shimmer.
- Ability-gated secrets — Areas that require specific abilities (Clawline, Dive, Float) to access.
- Puzzle-locked rooms — Require solving environmental puzzles or hitting switches in a specific order.
Pro Tip: If you see a room on the map that you can't figure out how to enter, there's likely a breakable wall or hidden passage nearby.
Moss Grotto Secrets (6)
1. Ancient Training Chamber
Type: Breakable wall Location: Upper-left section of Moss Grotto, above the Ruined Chapel How to find: After the Moss Mother boss fight, climb to the top of the room. Strike the left wall to reveal a hidden passage. Reward: Lore tablet about Pharloom's ancient warriors + 50 Rosaries
2. Hidden Moss Pool
Type: Fake floor Location: Central Moss Grotto, near the large pit with light from above How to find: Jump down the pit while hugging the left wall. Land on the hidden ledge and cut the vines to reveal the room. Reward: Mask Shard
3. Lore Chamber of First Weavers
Type: Hidden passage Location: Right side of Moss Grotto, near the Mosshome exit How to find: Walk into the seemingly solid wall between two moss-covered pillars. Reward: 3 Lore tablets detailing the First Weavers' history
4. Secret Weaving Workshop
Type: Breakable wall Location: Lower section, accessible after Wall Cling How to find: Cling to the right wall in the deepest room and strike the wall above a small alcove. Reward: 100 Rosaries + crafting lore
5. Underground Stream Chamber
Type: Ability-gated (requires Dash) Location: Behind a waterfall in the lower-left area How to find: Dash through the waterfall. The entrance is behind the falling water. Reward: 150 Rosaries
6. Moss Creature Nursery
Type: Breakable wall Location: Near the first bench (Coral Clearing) How to find: Strike the floor beneath a cluster of glowing mushrooms Reward: Lore tablet + ambient storytelling area
Bone Bottom Secrets (5)
7. Ancient Silk Library
Type: Puzzle-locked Location: Below the market area How to find: Hit three hidden switches in the market in the correct order (left, right, center) Reward: 200 Rosaries + Silk Lore collection
8. Merchant's Hidden Vault
Type: Breakable wall Location: Behind the Bone Bottom shop How to find: Strike the back wall of the shop interior (you may need to exit and re-enter) Reward: 250 Rosaries
9. Bonegrave Tomb
Type: Ability-gated (requires Simple Key) Location: Deepest level of Bonegrave How to find: Use a Simple Key on the ornate door in the crypt Reward: Mask Shard + lore tablets
10. Elevator Shaft Secret
Type: Hidden passage Location: Inside the main elevator shaft How to find: While riding the elevator, jump off at the midpoint — there's a ledge leading to a hidden room Reward: 150 Rosaries + Tool
11. Forge Undercroft
Type: Breakable floor Location: In the crafting area How to find: Dive Attack the cracked floor tiles near the forge Reward: Crafting materials + 100 Rosaries
Greymoor Secrets (7)
12. Cemetery Catacombs
Type: Breakable wall Location: Greymoor Cemetery, far right How to find: Strike the large tombstone that looks slightly different from the others Reward: 300 Rosaries + Thorn Ward tool (if not already obtained via quest)
13. Reaper's Hidden Study
Type: Ability-gated (requires Clawline) Location: Above the Chapel of the Reaper How to find: Use Clawline to reach a small opening in the ceiling of the chapel Reward: Lore about the Reaper Crest origins
14. Pilgrim's Secret Shrine
Type: Hidden passage Location: Along the Pilgrim Corridor (farming route) How to find: Walk through the wall between the second and third Pilgrim spawn points Reward: 200 Rosaries + shrine interaction
15-18. Four additional secrets
Greymoor contains four more hidden rooms in its upper and lower sections, containing Rosary stashes (150-250 each) and lore tablets. Look for texture variations on walls and suspicious dead-end corridors.
The Marrow & Hunter's March Secrets (6)
19. Skarrgard's Trophy Room
Type: Breakable wall Location: Behind the Skarrgard boss arena How to find: After defeating Skarrgard, strike the back wall of the arena Reward: 400 Rosaries + Hunter's Lore
20. Bell Beast Nesting Ground
Type: Ability-gated (requires Dive) Location: Below the Bell Beast station in The Marrow How to find: Dive through the cracked floor near the Bellway entrance Reward: Lore about Bell Beasts + Mask Shard
21-24. Additional Marrow Secrets
The Marrow contains four more hidden rooms, including the Marrow Treasury (500 Rosaries, accessed via the Lost Expedition quest) and several lore chambers.
Citadel of Bells Secrets (8)
The Citadel is the densest area for secrets in the game.
25. Behind the Third Bell
Type: Puzzle-locked Location: After ringing both Great Bells, a hidden third bell appears How to find: Return to the space between the two bell chambers. A new passage has opened. Reward: 300 Rosaries + major lore revelation
26. Clockwork Secret Room
Type: Ability-gated Location: Clockwork Tower upper section How to find: Use the Clock Beetle tool near a specific gear mechanism to reveal a passage Reward: 200 Rosaries + Clock Beetle enhancement
27. Bellhart Ceiling Alcove
Type: Breakable ceiling Location: In Bellhart town, to the right of the main area How to find: Look up for a slightly cracked ceiling section. Use an upward attack or throwable to break it. Reward: 200 Rosaries
28-32. Additional Citadel Secrets
Five more hidden rooms throughout the Citadel containing tools, Rosaries, and significant lore tablets about the history of Pharloom.
Late Game & DLC Secrets (12+)
Blasted Steps (3 secrets)
- Silkeater's hidden chamber — To the right of the Silkeater's Den, breakable wall leading to a Rosary cache
- Volcanic vent room — Dive through a lava-adjacent cracked floor (requires heat resistance)
- Watchtower attic — Clawline to the top of the Ruined Watchtower
High Halls (4 secrets)
- Royal Treasury passage — Hidden passage in the rightmost segment (600 Rosaries)
- Throne room secret — Behind the throne after defeating the area boss
- Library forbidden section — Breakable bookshelf in the Halls Library
- Balcony hidden alcove — Behind decorative curtains on the exterior balcony
Far Fields — DLC (5 secrets)
- Southeast hidden doorway — On the road to the Needolin door
- Nameless Town basement — Below the central building
- Ancient ruins chamber — Requires all DLC abilities
- Developer room — Easter egg room with Team Cherry references
- Surface overlook — Hidden area at the highest point of the Far Fields
Secret Room Checklist Tips
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Strike every wall — Develop the habit of hitting walls as you walk past them, especially at dead ends.
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Look up constantly — Many secrets are in ceilings. Breakable ceilings are one of the most commonly missed secret types.
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Revisit areas with new abilities — Many secrets require abilities you don't have on your first visit. Keep a mental note of suspicious locations.
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Use the map — Unexplored room indicators on the map often point to secret areas you haven't found yet.
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Listen for audio cues — Some hidden rooms produce faint sounds (humming, dripping water, wind) that hint at their presence.
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Check behind bosses — Almost every boss arena has a secret room behind or below it.
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25 for the achievement — You only need 25 of the 60+ secrets for the "Secret Keeper" achievement, so don't stress about finding every single one on your first playthrough.