Difference between revisions of "Perception"

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(finished requirements for checks on the page)
 
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=== Headwear ===
 
=== Headwear ===
 
* {{Itemlink|Adaptive Goggles}} (+1 Perception on equip)
 
* {{Itemlink|Adaptive Goggles}} (+1 Perception on equip)
 +
* {{Itemlink|Cyclop's Eye}} (+1 Perception on equip)
 
* {{Itemlink|Synesthetic Refocus}} (+2 Perception when equipped and character is focused, -2 Perception when character is unfocused)
 
* {{Itemlink|Synesthetic Refocus}} (+2 Perception when equipped and character is focused, -2 Perception when character is unfocused)
 
* {{Itemlink|Synesthetic Refocus|Synesthetic Refocus(Hexagon)}} (+3 Perception when equipped and character is focused, -3 Perception when character is unfocused)
 
* {{Itemlink|Synesthetic Refocus|Synesthetic Refocus(Hexagon)}} (+3 Perception when equipped and character is focused, -3 Perception when character is unfocused)
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* {{Itemlink|Gas Mask}} (-2 Perception on equip)
 
* {{Itemlink|Gas Mask}} (-2 Perception on equip)
 
* {{Itemlink|Tchortist Bioscrubber}} (-2 Perception on equip)
 
* {{Itemlink|Tchortist Bioscrubber}} (-2 Perception on equip)
 +
* {{Itemlink|Perceptual Isolation Helmet}}{{heavyduty-inline}} (Perception set to 1)
  
 
=== Suit ===
 
=== Suit ===
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* {{Itemlink|Biohazard Suit}} (-2 Perception on equip)
 
* {{Itemlink|Biohazard Suit}} (-2 Perception on equip)
 
* {{Itemlink|Fire Proximity Suit}} (-2 Perception on equip)
 
* {{Itemlink|Fire Proximity Suit}} (-2 Perception on equip)
 +
* {{Itemlink|Blast Suit}} (-2 Perception on equip)
 
* {{Itemlink|Robe}} (-2 Perception on equip)
 
* {{Itemlink|Robe}} (-2 Perception on equip)
 
* {{Itemlink|Tchortist Robe}} (-2 Perception on equip)
 
* {{Itemlink|Tchortist Robe}} (-2 Perception on equip)
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=== Food ===
 
=== Food ===
 
* {{Itemlink|All-in}} (temporarily +3 all base abilities)
 
* {{Itemlink|All-in}} (temporarily +3 all base abilities)
 +
* {{Itemlink|Boolean}} (temporarily -3 all base abilities)
 
* {{Itemlink|Mushroom Salad}} (temporary +1 Perception)
 
* {{Itemlink|Mushroom Salad}} (temporary +1 Perception)
 
* {{Itemlink|Junkyard Surprise}} (temporary random base ability effect, can only decrease Perception)
 
* {{Itemlink|Junkyard Surprise}} (temporary random base ability effect, can only decrease Perception)
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* {{Itemlink|Mushroom Brew}} (temporary -2 Perception)
 
* {{Itemlink|Mushroom Brew}} (temporary -2 Perception)
 
* {{Itemlink|Kzozel}} {{expedition-inline}} (temporary -2 Perception)
 
* {{Itemlink|Kzozel}} {{expedition-inline}} (temporary -2 Perception)
 +
* {{Itemlink|Stalagdrop}} (temporary -1 Perception)
 
* {{Itemlink|White Dude}} (temporarily -2 Perception)
 
* {{Itemlink|White Dude}} (temporarily -2 Perception)
 +
* {{Itemlink|Cave Tear}} (temporary -3 Perception)
  
 
=== Drugs ===
 
=== Drugs ===
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| leads to a small island
 
| leads to a small island
 
|-
 
|-
−
| Lower Caves, [[Siphoner Pools]], northeast ([[:File:jyt3.png|jyt3.png]])
+
| Lower Caves, [[Siphoner Pools (Lower Caves)|Siphoner Pools]], northeast ([[:File:jyt3.png|jyt3.png]])
 
| Underwater rock bridge
 
| Underwater rock bridge
 
| 8 Perception
 
| 8 Perception
Line 188: Line 194:
 
| NW corner of map, through the backside of the camp, contains a [[Jumping Bean]] and random tabi boots
 
| NW corner of map, through the backside of the camp, contains a [[Jumping Bean]] and random tabi boots
 
|-
 
|-
−
| [[Upper Caves]], Synesthete/Formedicator camp, under the Oculus
+
| [[Upper Caves]], [[Synesthete camp]], under the {{spoiler|Oculus}}
 
| Hidden stash
 
| Hidden stash
 
| 11 Perception
 
| 11 Perception
Line 299: Line 305:
 
|-
 
|-
 
| Core City, utility section ([[:File:Cc_utility.png|Cc_utility.png]])
 
| Core City, utility section ([[:File:Cc_utility.png|Cc_utility.png]])
−
| Squeeze though gap in pipes  
+
| Squeeze through gap in pipes  
 
| 11 Perception (can be bypassed with night vision mode of the [[Goggles]])
 
| 11 Perception (can be bypassed with night vision mode of the [[Goggles]])
 
| leads to Phreak's hideout, boilers area
 
| leads to Phreak's hideout, boilers area
 
|-
 
|-
−
| Core City, utility section steam area
+
| Core City, [[Utility Facility]] steam area
 
| Junk pile
 
| Junk pile
 
| 7 Perception  
 
| 7 Perception  
 
| Contains [[TiChrome Spikes]] and a [[Boot Spring]], NW corridor
 
| Contains [[TiChrome Spikes]] and a [[Boot Spring]], NW corridor
 
|-
 
|-
−
| Core City, utility section steam area, through the door east of the steam console, near Modified Industrial Bot
+
| Core City, [[Utility Facility]] steam area, through the door east of the steam console, near Modified Industrial Bot
 
| Plasma cell
 
| Plasma cell
 
| 10 Perception  
 
| 10 Perception  
 
| [[Plasma Cell]] and a [[Plasma Core]]
 
| [[Plasma Cell]] and a [[Plasma Core]]
 
|-
 
|-
−
| Core City, utility section electric coil area
+
| Core City, [[Utility Facility]] electric coil area
 
| Phreak's laptop
 
| Phreak's laptop
 
| Quest trigger
 
| Quest trigger
 
| laptop hidden in trash pile in his hideout, available after his disappearance
 
| laptop hidden in trash pile in his hideout, available after his disappearance
 
|-
 
|-
−
| Core City, utility section electric coil area, SE room on 2nd floor
+
| Core City, [[Utility Facility]] electric coil area, SE room on 2nd floor
 
| Bag
 
| Bag
 
| 8 Perception  
 
| 8 Perception  
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| 9 Perception
 
| 9 Perception
 
| contains around fifty UN dollars
 
| contains around fifty UN dollars
 +
|-
 +
| Core City, [[Port Zenith]] warehouses
 +
| Hidden safe
 +
| 9 Perception
 +
| Hidden locked safe in [[Captain Wilkins]]s room, contains fifty [[United Stations Dollars]], an energy pistol and a [[Fusion Cell]]
 
|-
 
|-
 
| [[Upper Underrail]], east of [[Notus Living Block]] ([[:File:up3x.png|up3x.png]])
 
| [[Upper Underrail]], east of [[Notus Living Block]] ([[:File:up3x.png|up3x.png]])
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|-
 
|-
 
| [[The Rig]], room #2 || [[Note (The Rig)]] || 5 Perception || under the bed
 
| [[The Rig]], room #2 || [[Note (The Rig)]] || 5 Perception || under the bed
 +
|-
 +
| [[Rig Periphery]], Waterways 9 || Hidden stash || Quest trigger or 16 Perception || discovers [[Knuckles]]' stash
 
|-
 
|-
 
| [[Chancer's Bay]], NE map || Hole through wall of shack || 10 Perception || biohazard boots, corrosive acid, [[Encyclopedia Fragment]] oddity, mutants
 
| [[Chancer's Bay]], NE map || Hole through wall of shack || 10 Perception || biohazard boots, corrosive acid, [[Encyclopedia Fragment]] oddity, mutants
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| [[Core City Docks]], empty room next to Ray's shop || Vent in north wall || 10 Perception || leads into Ray's shop, dying burglar
 
| [[Core City Docks]], empty room next to Ray's shop || Vent in north wall || 10 Perception || leads into Ray's shop, dying burglar
 
|-
 
|-
−
| [[Dude's House - Core City]] || Cracked floor panel/wall safe || 5 || key to wall safe/the safe itself
+
| [[Dude's House - Core City]] || Cracked floor panel/wall safe || 5 Perception || key to wall safe/the safe itself
 
|-
 
|-
 
| [[Dude's House - Caves]] || Footlocker under bed || 9 Perception || psionic mentor
 
| [[Dude's House - Caves]] || Footlocker under bed || 9 Perception || psionic mentor
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| [[Siphoner Pools (Black Sea)]] || Underwater rock bridge || 7 Perception || leads to a lingula plant and a random treasure "crevice"
 
| [[Siphoner Pools (Black Sea)]] || Underwater rock bridge || 7 Perception || leads to a lingula plant and a random treasure "crevice"
 
|-
 
|-
−
| [[Siphoner Pools (Black Sea)]], west chamber || Buried box || 11 Perception || SGS credits, Charons, UN dollars
+
| [[Siphoner Pools (Black Sea)]], west chamber || Buried box || 11 Perception || SGS credits, Charons, US dollars
 
|-
 
|-
 
| [[Black Sea]] ([[C8]]), hopper island cave, north wall, west side || Hidden stash || 9 Perception || secret stash in cave wall, quiver belt and special bolts
 
| [[Black Sea]] ([[C8]]), hopper island cave, north wall, west side || Hidden stash || 9 Perception || secret stash in cave wall, quiver belt and special bolts
 
|-
 
|-
−
| [[Black Sea]] ([[A10]]), Yngwar's cave island, hidden walkway in water on east side|| Hidden stash || 8 Perception || secret stash in cave wall, contains coagulation shot, two antidotes and four rusting acid cvials
+
| [[Black Sea Grotto]] ([[A10]]), Yngwar's cave island, hidden walkway in water on east side|| Hidden stash || 8 Perception || secret stash in cave wall, contains coagulation shot, two antidotes and four rusting acid cvials
 
|-
 
|-
 
| [[Mutie Refuge]], crane room || Hidden vent shaft || 7 Perception || secret vent shaft through wall into crane room
 
| [[Mutie Refuge]], crane room || Hidden vent shaft || 7 Perception || secret vent shaft through wall into crane room
 +
|-
 +
| [[West Storage Depot]], lvl 2, east room || Hidden box of bullets || 6 Perception || 30x [[9mm Standard Round]]s
 +
|-
 +
| [[West Storage Depot]], lvl 2, southeast room || Hidden box of bullets || 9 Perception || 11x [[12.7mm Standard Round]]s
 
|-
 
|-
 
| [[West Storage Depot]], lvl 3 by the elevator || Hidden vent shaft || 8 Perception || secret vent shaft to blocked room
 
| [[West Storage Depot]], lvl 3 by the elevator || Hidden vent shaft || 8 Perception || secret vent shaft to blocked room
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| [[Black Sea]] ([[I2]]), tower north of Health Center, 2nd floor || Hidden corpse || 9 Perception || corpse with loot (can be looted without detection)
 
| [[Black Sea]] ([[I2]]), tower north of Health Center, 2nd floor || Hidden corpse || 9 Perception || corpse with loot (can be looted without detection)
 
|-
 
|-
−
| [[Nexus of Technology]], level 1, SE room || Hidden wall safe || 9 Perception || loot
+
| [[Nexus of Technology]], level 1, SE room || Hidden wall safe || 9 Perception || safe contains [[Energy Shield Emitter]] and two [[Plasma Cell]]s
 
|-
 
|-
−
| [[Port Crag]], east building || Hidden pipe tunnel || 9 Perception || Crawl through to west building, 2nd floor (agility 8; it is from the other direction)
+
| [[Port Crag]], east building || Hidden pipe tunnel || 9 Perception || drawl through to west building, 2nd floor (agility 8; it is from the other direction)
 
|-
 
|-
 
| [[Fetid Marsh]], east side of [[K5]]/west side of [[L5]] || Hidden map exit(s) || 10 Perception || secret camp with [[Signed Arena Ticket]] and [["ArenaNow" Broadcasting Schedule]] oddities and [[Slimy Tablet Computer]]
 
| [[Fetid Marsh]], east side of [[K5]]/west side of [[L5]] || Hidden map exit(s) || 10 Perception || secret camp with [[Signed Arena Ticket]] and [["ArenaNow" Broadcasting Schedule]] oddities and [[Slimy Tablet Computer]]
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|-
 
|-
 
|  [[Giant Creeper Lair]] (two maps east of the Nexus), NW corner || Hidden passages || 9 Perception || secret passages to/from hidden room, shortcut past creepers
 
|  [[Giant Creeper Lair]] (two maps east of the Nexus), NW corner || Hidden passages || 9 Perception || secret passages to/from hidden room, shortcut past creepers
 +
|}
 +
 +
=== Heavy Duty ===
 +
{{incomplete list}}
 +
 +
{| class="sortable wikitable"
 +
|-
 +
! Location !! Secret !!data-sort-type="number"| Requirement !! Details
 +
|-
 +
| Core City, [[Rag's Boutique]]|| Hidden trap door || 11 Perception || Discover entrance to the basement
 +
|-
 +
| Core City, [[Rag's Boutique]], basement || Discover contents behind the curtains || 13 Perception || Allows to target the auto-turrets without lifting the curtains
 +
|-
 +
| [[The Compound]], outside, northern side of the map || Hidden metal plates || 10 Perception || Hidden high quality two random metal plates behind a fence
 +
|-
 +
| [[The Compound]], entrance stairs || Hidden vent || 14 Perception || Leads to a blocked restroom that has a medical locker with [[Adrenaline Shot]] and [[Coagulation Shot]]
 +
|-
 +
| [[The Compound]], entrance offices || Hidden safe || 12 Perception || Hidden locked safe containing around 100 charons and a [[Gold Ring]]
 +
|-
 +
| [[The Compound]], exoskeleton assembler lab || Shelf back panel missing || 15 Perception || Secret passage behind a computer rack to the north, leads to a box with 3 [[Shock Bolt Mk III|Shock Bolts Mk III]], 2 [[Plasma Grenade Mk III|Plasma Grenades Mk III]] and a [[Laser Pistol]]
 +
|-
 +
| [[The Compound]], Fusion Cannon lab || Hidden [[Plasma Cell]] || 9 Perception || Under a table in the south
 +
|-
 +
| [[The Compound]], medical section 1 || Smaller box || 12 Perception || Hidden box inside a bigger box in the office, contains a vial of [[Aegis (medicine)|Aegis]]
 +
|-
 +
| [[The Compound]], medical section 2 || [[Super Health Hypo]] || 11 Perception || Found under a desk near the med stations in eastern side of the map
 +
|-
 +
| [[The Compound]], command, NW room || Hidden safe || 14 Perception || Hidden locked safe containing 3 [[Fusion Cell]]s, 3 [[Shock Bolt Mk III|Shock Bolts Mk III]], 4 [[Shock Bolt Mk II|Shock Bolts Mk II]] and a high quality [[Smart Module]]
 
|}
 
|}
  

Latest revision as of 10:16, 23 April 2024

“ Perception represents character's ability to discern objects from far away as well as to notice hidden things in their vicinity. It helps the character to use ranged weapons more effectively, as well as detect hidden objects, passages and creatures. ”

— In-game description

Details

Perception determines your character's overall awareness and effectiveness with ranged weapons. It also affects your character's chance to detect hidden passages, objects or stealthed creatures and NPCs. It does not increase your vision or visible range. Perception does not directly affect your chance to hit, but rather increases your ranged weapon skills, which in turn increases your chance to hit with ranged weapons. Melee weapon hit rate is unchanged but increased with melee skill (through strength or dexterity). No items require perception to be used or equipped.

High perception score is important for characters who wish to use ranged weapons or find traps, stealthed enemies and secrets.

Directly affected skills

Other effects

  • Detection
  • Finding secrets (uses perception score instead of detection)

Related feats

See Category:Perception feats.

Related items

Headwear

Suit

Food

Drugs

Perception checks

Tilemarker Perception.png

Discovering secret areas is based on Perception score alone, unlike detecting traps and stealthed characters, which is based on Detection. Discovering some secrets requires prior knowledge instead of Perception score.

In addition to secrets, Underrail: Expedition expansion added visible in-world Perception checks similar to Strength, Dexterity and Agility checks.

Base game

This list is incomplete; you can help by expanding it.
Location Secret Requirement Details
Lower Caves, South Gate Outposts, Area South outposts, inside NW outpost (Forlornstations1.png) Trapdoor 6 Perception connects the two south outposts
Lower Caves, South Gate Outposts, Area South outposts, inside NE outpost (Forlornstations1.png) Trapdoor 6 Perception connects the two south outposts
Lower Caves, South Gate Outposts, Area East outpost, inside the outpost (ForlornStations4.png) Trapdoor 7 Perception connects east and northwest outposts
Lower Caves, South Gate Outposts, Area East outpost, northeast tunnels (ForlornStations4.png) Trapdoor 8 Perception connects east and northwest outposts
Under-passages Lower Passages Dungeon, (Dun lup-a.png) Passage Quest trigger or 11 Perception entrance to the next area in the Camera problems quest
Under-passages area 1, near SGS (lup-a1.png) Door 7 Perception secret room along east wall, Strange Comm Device oddity
Lower Underrail, GMS compound level 1 (GammaCompound1.png) Safe 7 Perception secret safe in room near southwest corner
Lower Underrail, GMS compound level 2 (GammaCompound2.png) Secret passage 7 Perception secret room along east wall, Old Data Medium oddity
Lower Underrail, GMS compound level 3 (GammaCompound3.png) First aid box 7 Perception SW room, hidden under couch, medicine including an Advanced Health Hypo
Lower Caves, east from GMS compound level 3 (cv12.png) Secret crawlspace 8 Perception leads to the back entrance of the raider base
Lower Caves, raider base Adrenaline shot 8 Perception under Gerhard Page's bed
Lower Caves between Mushroom Cove and Junkyard (jyt1.png) Underwater rock bridge 8 Perception leads to a small island
Lower Caves, Siphoner Pools, northeast (jyt3.png) Underwater rock bridge 8 Perception leads to the northeast corner of the cave
Lower Caves, Water Treatment Facility Plasma cell 6 Perception under a table in the power room
Lower Caves, Water Treatment Facility Shotgun shells 8 Perception on top of a locker in the SE room on the upper level
Lower Caves, Water Treatment Facility First-aid kit 7 Perception in the SE room on the lower level, random medicine
Lower Caves, Water Treatment Facility Hidden opening 9 Perception secret compartment in the ventilation system, Deathstalker corpse with Crawler's Eye oddity
Lower Caves, Water Treatment Facility Secret crawlspace 7 Perception along north wall on the lower level, leads to secluded room with loot
Silent Isle, southeast (si1.png) Underwater rock bridge 7 Perception leads to a small island with a corpse with random Mutated Dog Leather Armor
Junkyard, Security control room of Depot A east area (ojy2.png) Secret door 10 perception shortcut bypassing the turrets
Lower Underrail area 6, Lunatic camp (lu-a6.png) Hidden stash 8 Perception secret footlocker near rock pile
Upper Caves, south of Milton's camp (lux-a10.png) Underwater rock bridge 7 Perception shortcut between the north and south bank of the river
Upper Caves, ironhead camp, two zones north of the Bunker (Lux-b16.png) Hidden stash 10 Perception NW corner of map, through the backside of the camp, contains a Jumping Bean and random tabi boots
Upper Caves, Synesthete camp, under the Oculus Hidden stash 11 Perception in the rock next to the Synesthete, contains roughly 300 charons
Upper Caves, misty river north of Hecate caves entrance Underwater rock bridge 9 Perception leads to a box containing a Niobium Piercing Set
Lost Vault entrance Hidden ventilation shaft 9 Perception leads into the shack behind the trader
Lost Vault interior Hidden first-aid box 7 Perception random medicine
Lost Vault interior Hidden footlocker 7 Perception in room along north wall, contains Circular Wave Amplifier
Lost Vault interior Hidden bag 10 Perception in the northern room along west wall, accessible only with 11 Strength, contains two advanced mechanical and electronic repair kits and a lighter
Lost Vault interior Hidden sack 9 Perception South-western room, accessible only with 11 Agility, contains Greater Fusion Cell, two Fusion Cells and two Plasma Cells
Lower Caves, south of Crossroad Caves (cv2.png) Trapdoor 8 Perception connects southwest and southeast corner, locked box with random psionic mentor
Lower Caves, south of Crossroad Caves (cv2.png) Underwater rock bridge 7 Perception shortcut bypassing siphoners
Lower Caves, south of Camp Hathor (cv19.png) Underwater rock bridge 7 Perception shortcut bypassing rathound nest
Lower Caves, Rathound King Lair (rkl2.png) Door Quest trigger or 10 Perception shortcut leading outside if you offer to kidnap Sarine or negotiate a truce with Camp Hathor
Lower Caves, Rathound King Lair, outside (cv21.png) Door Quest trigger or 15 Perception shortcut leading to the lair if you offer to kidnap Sarine or negotiate a truce with Camp Hathor
Lower Underrail, Abandoned Warehouse (aw1-1.png) Secret crawlspace 7 Perception secret ventilation shaft section with a footlocker and a rathound
Rail Crossing, behind bar (rc1.png) Secret door 7 Perception leads to Deacon's shop
Rail Crossing, Buzzer's Shop's ventilation shafts (rc_shop 3.png) Hidden Ventilation Shaft 7 Perception secret ventilation shaft section with Hardware Bug
Lower Underrail, The warehouse from Dude's vision (lu-b4.png) Secret crawlspace Quest trigger leads to the lower level of the warehouse during Dude's quest
Free Drones Base, east room Trapdoor 11 Perception can't be opened; handle breaks
Upper Caves, north from the Hanging Rat bar (lux-c2.png) Hidden stash 11 Perception secret stash inside rock pillar (not visible on the linked map)
Foundry, Evelyn's home (fo3.png) Trapdoor 10 Perception connects Evelyn's house and bunker
Foundry, Evelyn's home (fo3.png) Secret crawlspace Quest trigger leads to Evelyn's bunker if a male player character has a drink with her
Lower Underrail, cave west of Foundry (lu-b22x.png) Hidden stash 10 Perception secret stash inside rock pillar
Core City, SW middle level (Cc17.png) Ladder 14 Perception leads to Phreak's hideout, utility section electric coil area
Core City, utility section (Cc_utility.png) Squeeze through gap in pipes 11 Perception (can be bypassed with night vision mode of the Goggles) leads to Phreak's hideout, boilers area
Core City, Utility Facility steam area Junk pile 7 Perception Contains TiChrome Spikes and a Boot Spring, NW corridor
Core City, Utility Facility steam area, through the door east of the steam console, near Modified Industrial Bot Plasma cell 10 Perception Plasma Cell and a Plasma Core
Core City, Utility Facility electric coil area Phreak's laptop Quest trigger laptop hidden in trash pile in his hideout, available after his disappearance
Core City, Utility Facility electric coil area, SE room on 2nd floor Bag 8 Perception random knife
Core City, Drop Zone (cc15.png) Secret door Quest trigger or 6 Perception leads to Bogdan's hideout, can be found with perception or by learning about it from Kupusije during Find Bogdan, or with perception after starting Sewers generator/Retrieve ICPD
Core City, inside one of Drop Zone buildings (cc5_1.png) Trapdoor 8 Perception leads to the basement
Core City, north Core City Sewers (cc_s2.png) Door 8 Perception leads to a secret room on the west side containing some loot
Core City, northwest Core City Sewers (cc_s6 2.png) Switch Quest trigger opens door to Acid Hunters' hideout during the Look for Cornell quest
Core City, Zaman's Lair, Underground lake (Cc zamanscave2.png) Hidden stash 9 Perception contains around fifty UN dollars
Core City, Port Zenith warehouses Hidden safe 9 Perception Hidden locked safe in Captain Wilkinss room, contains fifty United Stations Dollars, an energy pistol and a Fusion Cell
Upper Underrail, east of Notus Living Block (up3x.png) Trapdoor 7 Perception connects trapdoor and a Lunatic base
Upper Underrail, inside Panacea Lab (plb.png) Switch 8 Perception opens door to the room in the northeast corner
Upper Underrail, Gubbins' banidt camp (Up7.png) Ventilation Shaft 8 Perception connects inside of structure to outside, north of the barrel fire
Utility Tower, first room past metal gate Ventilation Shaft 9 Perception ladder leading up, skips some floors
Institute of Tchort, armory, behind the locked fence (Tch-mil.png) Box of ammo 8 Perception x11 12.7mm W2C Rounds
Institute of Tchort, utility section 2, south room (Tch-util2.png) Box 8 Perception one Aegis, three Gizzard Enzymes
Institute of Tchort, utility section 3, northwest corner (tch-util3.png) Morphine shot on file cabinet 10 Perception one morphine shot
Institute of Tchort, utility section 3, northeast corner (tch-util3.png) Ventilation Shaft 8 Perception connects west wing and utility section
Institute of Tchort, west wing, in coil spider room (tch-ww2.png) Ventilation Shaft 7 Perception connects west wing and utility section
Institute of Tchort, Harpocrates Station, north room (tch_met.png) Secret crawlspace Quest trigger leads to the ventilation system during Track down Rassophore Nevil
Institute of Tchort, Upper Underrail Ventilation System (tch_mv1.png) Secret crawlspace 8 Perception secret ventilation shaft section with a box
Institute of Tchort, Upper Underrail Ventilation System, southwest room (tch_mv1_2.png) Secret trapdoor 10 Perception leads to hidden basement
Deep Caverns, lake, northeast bank (dc-lk.png) Underwater rock bridge 7 Perception leads to a small island with hackable box
Deep Caverns, lake, southwest islet (dc-lk.png) Sniper rifle 10 Perception reveals Black Arrow sniper rifle
Deep Caverns, Hollow Earth (dc-la2.png) Secret crawlspace 8 Perception secret entrance to the small building on the east
Deep Caverns, checkpoint between Caerus and warehouses (dc-cp1.png) Underwater rock bridge 8 Perception leads to the east bank of the lake
Deep Caverns, Warehouse Block 2, south toxic storage (dc-wh3.png) Trapdoor 8 Perception leads to lower level, Electrokinetic Imprint mentor
Deep Caverns, Caerus Residential, northwest building, second floor (dc-res2 2.png) Ventilation Shaft 10 Perception leads to a cavern with Gunter Vasilica, Pseudo-spatial Projection mentor, and Regenerative Mixture
Deep Caverns, Caerus Residential, west apartment (dc-res3.png) Safe 6 Perception secret safe
Deep Caverns, Arke Power Station, utility section toxic storage (dc-pp_ut.png) Trapdoor 11 Perception connects toxic storage and storage room
Deep Caverns, Arke Power Station, utility section storage room (dc-pp_ut.png) Trapdoor 10 Perception connects toxic storage and storage room
Deep Caverns, Deep Mushroom Forest (dc-fs4.png) Secret tunnel 9 Perception leads to the northwest corner and a skeleton

Expedition

This list is incomplete; you can help by expanding it.
Location, Underrail Secret Requirement Details
Abandoned Waterway Facility, east zone, on the island south of the bridge Hidden stash 8 Perception exceptionally high-quality Mutated Dog Leather
The Rig, room #2 Note (The Rig) 5 Perception under the bed
Rig Periphery, Waterways 9 Hidden stash Quest trigger or 16 Perception discovers Knuckles' stash
Chancer's Bay, NE map Hole through wall of shack 10 Perception biohazard boots, corrosive acid, Encyclopedia Fragment oddity, mutants
Isaac's River, northernmost map Hidden stash 10 Perception stash in north wall of cave
Core City Docks, empty room next to Ray's shop Vent in north wall 10 Perception leads into Ray's shop, dying burglar
Dude's House - Core City Cracked floor panel/wall safe 5 Perception key to wall safe/the safe itself
Dude's House - Caves Footlocker under bed 9 Perception psionic mentor
Gray Army Base - Barracks, two rooms east of the rift Secret trapdoor 8 Perception electronic components
Gray Army Base - Schtab Wall safe 9 Perception secret safe in north wall of northwest room
Gray Army Base - Schtab Secret opening 9 Perception Connects northern and southern parts of the ventilation system
This list is incomplete; you can help by expanding it.
Location, Black Sea Secret Requirement Details
Black Sea (E4), north side of island Entrance to cave 11 Perception entrance to pirate prison trash dump, leads to Thrasher, a boss hermit crab
Siphoner Pools (Black Sea) Underwater rock bridge 7 Perception leads to a lingula plant and a random treasure "crevice"
Siphoner Pools (Black Sea), west chamber Buried box 11 Perception SGS credits, Charons, US dollars
Black Sea (C8), hopper island cave, north wall, west side Hidden stash 9 Perception secret stash in cave wall, quiver belt and special bolts
Black Sea Grotto (A10), Yngwar's cave island, hidden walkway in water on east side Hidden stash 8 Perception secret stash in cave wall, contains coagulation shot, two antidotes and four rusting acid cvials
Mutie Refuge, crane room Hidden vent shaft 7 Perception secret vent shaft through wall into crane room
West Storage Depot, lvl 2, east room Hidden box of bullets 6 Perception 30x 9mm Standard Rounds
West Storage Depot, lvl 2, southeast room Hidden box of bullets 9 Perception 11x 12.7mm Standard Rounds
West Storage Depot, lvl 3 by the elevator Hidden vent shaft 8 Perception secret vent shaft to blocked room
Crimson Meadow Horticulture Center lower floor, west section, north side Hidden vent shaft 11 Perception secret vent shaft through wall
Black Sea (I1), outside the Health Center, SE corner Hidden hole through wall 10 Perception secret passage to hidden room
Black Sea (I2), tower north of Health Center, 2nd floor Hidden corpse 9 Perception corpse with loot (can be looted without detection)
Nexus of Technology, level 1, SE room Hidden wall safe 9 Perception safe contains Energy Shield Emitter and two Plasma Cells
Port Crag, east building Hidden pipe tunnel 9 Perception drawl through to west building, 2nd floor (agility 8; it is from the other direction)
Fetid Marsh, east side of K5/west side of L5 Hidden map exit(s) 10 Perception secret camp with Signed Arena Ticket and "ArenaNow" Broadcasting Schedule oddities and Slimy Tablet Computer
Fetid Marsh, SW corner of K4 Hidden pool jumps 12 Perception secret platforms for easier jumping across leper pool
Giant Creeper Lair (two maps east of the Nexus), NW corner Hidden passages 9 Perception secret passages to/from hidden room, shortcut past creepers

Heavy Duty

This list is incomplete; you can help by expanding it.
Location Secret Requirement Details
Core City, Rag's Boutique Hidden trap door 11 Perception Discover entrance to the basement
Core City, Rag's Boutique, basement Discover contents behind the curtains 13 Perception Allows to target the auto-turrets without lifting the curtains
The Compound, outside, northern side of the map Hidden metal plates 10 Perception Hidden high quality two random metal plates behind a fence
The Compound, entrance stairs Hidden vent 14 Perception Leads to a blocked restroom that has a medical locker with Adrenaline Shot and Coagulation Shot
The Compound, entrance offices Hidden safe 12 Perception Hidden locked safe containing around 100 charons and a Gold Ring
The Compound, exoskeleton assembler lab Shelf back panel missing 15 Perception Secret passage behind a computer rack to the north, leads to a box with 3 Shock Bolts Mk III, 2 Plasma Grenades Mk III and a Laser Pistol
The Compound, Fusion Cannon lab Hidden Plasma Cell 9 Perception Under a table in the south
The Compound, medical section 1 Smaller box 12 Perception Hidden box inside a bigger box in the office, contains a vial of Aegis
The Compound, medical section 2 Super Health Hypo 11 Perception Found under a desk near the med stations in eastern side of the map
The Compound, command, NW room Hidden safe 14 Perception Hidden locked safe containing 3 Fusion Cells, 3 Shock Bolts Mk III, 4 Shock Bolts Mk II and a high quality Smart Module


v · d · e
Base Abilities
Strength • Dexterity • Agility • Constitution • Perception • Will • Intelligence (Removed: Charisma • Wisdom)
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