Casualties: Unknown WikiUnofficial field guide
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Beginner guide

Treat injuries

Medical & triageBleeding & blood lossInternal bleedingInfection & sepsisFractures, dislocations & shrapnelHeart, blood pressure & strokeBrain damage

Survive

Mood & last standFood, water, heat & sleep

The descent

All 11 layersCharactersEndings

Reference

Crafting & INT plannerSkills: INT, STR, RESRun settings & difficultyConsole commandsSaving & save filesAchievementsMods & multiplayerFAQUpdates & patch notes
Official Steam page

Unofficial field guide · Release 1.0 (Nov 9, 2026)

Casualties: Unknown Wiki & Survival Guide

You are one of thousands of test subjects sent into an alien pit to fetch lost cargo. This guide keeps you breathing: how to treat every injury the health panel can show, what waits on all 11 layers, and how to reach an ending.

Something is wrong with me First run guide

Triage

What hurts?

Pick a body part. Each file gives the signs, the fix in order, and the items that help. More detail on the medical guide.

UNI-TRIAGE v1.020 files

Tap a body part, then open a symptom file.

Internal bleeding Critical

Signs: Blood volume drops but no limb shows a teardrop. Internal bleeding moodle from about 0.043 L/min. Coughing or vomiting blood.

  1. Use an L.R.D. or makeshift L.R.D., inject procoagulant, or eat helluce.
  2. Do not thin your blood: low viscosity makes every bleed faster.
  3. Watch for hemothorax and drain it.
  • Makeshift L.R.D. (INT 10)
  • L.R.D. serum (INT 11)
  • L.R.D. (INT 15)
  • Procoagulant
  • Helluce (layer 4+)
Full guide: internal bleeding →
Hemothorax Critical

Signs: Yellow outline growing around the lungs. Moodle at 40, critical at 70. Max oxygen and breathing rate fall.

  1. Stop the internal bleeding first, or it keeps refilling.
  2. Use a chest drain on the chest: -35 hemothorax per use. It recharges over time.
  3. Below the internal-bleeding threshold it also drains on its own, about 2 per minute.
  • Chest drain (INT 12)
Full guide: hemothorax →
Sepsis Critical

Signs: Sepsis moodle once total infection across limbs passes 100. Low blood pressure, less stamina and oxygen.

  1. Bring total infection under 100: disinfect every infected limb or amputate the worst one.
  2. Antibiotics and antiserum slow it. At 196% immunity infections clear on their own.
  • Antibiotics
  • Antiserum
Full guide: sepsis →
Fibrillation Critical

Signs: Heart rate climbing fast, ragged ECG, alarm above 60%, heartbeat audible outside the panel.

  1. Shock it: AED, or a manual defibrillator set to about 2x the fibrillation % in joules.
  2. Amiodarone lowers it. Touching a coil also resets it.
  3. Fix the cause or it returns: low blood pressure, low oxygen, high heart rate, thick blood, cold, too much epinephrine.
  • AED
  • Manual defibrillator
  • Amiodarone
  • Auto-pump
Full guide: fibrillation →
Cardiac arrest Critical

Signs: Flat ECG, heart rate 0, the screen fades with the dying drone.

  1. Put on an auto-pump if you have one: it keeps oxygen moving.
  2. Shock with a defibrillator: each successful shock has a 20% chance to restart the heart, any power works.
  3. Epinephrine can restart it too (with 50% fibrillation).
  • Auto-pump
  • AED / manual defibrillator
  • Epinephrine
Full guide: cardiac arrest →
Stroke Critical

Signs: Stuttering speech, losing vision behind you, left arm getting weak, the health button flashing. The moodle only shows above 70.

  1. Braingrow (any amount) clears it over 100 seconds.
  2. Procoagulant reduces it fast. A neural booster or mindwipe resets it.
  3. Then lower blood pressure so it does not happen again.
  • Braingrow
  • Procoagulant
  • Neural booster (INT 18)
Full guide: stroke →
Bleeding Serious

Signs: Teardrop icons on a limb, the Bleeding moodle, blood volume falling in the health panel.

  1. Drag a dressing onto the bleeding limb and finish the bandage minigame.
  2. Over about 1 L/min: tourniquet that limb first (never the head), then bandage, then take the tourniquet off.
  3. Refill blood: blood bag, Ringer's solution or saline. Stay fed: blood only regenerates with hunger above 0.
  • Dressing (INT 7)
  • Sterilized dressing
  • Tourniquet (INT 9)
  • Blood bag (INT 12)
Full guide: bleeding →
Infection Serious

Signs: Cyst icon on a limb (shown from 25%), green then purple stripes on the body, rising temperature, limb pain.

  1. Disinfect the limb: sterilized dressing, relief cream or antiseptic from a spray bottle, or a glowplant fruit in a pinch.
  2. Raise immunity: eat, stay warm, antibiotics.
  3. Above 60% you can amputate with a blade to stop it spreading.
  • Spray bottle (INT 7)
  • Relief cream / Antiseptic (INT 9)
  • Antibiotics
  • Machete or cleaver for amputation
Full guide: infection →
Fracture Serious

Signs: Broken-bone icon. A broken arm cannot hold items. A broken leg hurts on every jump and landing.

  1. A bone welding tool cuts the remaining heal time to a quarter: use it early.
  2. A splint speeds healing about 2.5x.
  3. Untreated, a fracture heals in about 39 minutes: stock food and water.
  • Bone welding tool
  • Splint
Full guide: fracture →
Blood pressure too low or high Serious

Signs: Hypotension moodles below 110/73, hypertension above 130/86. Dizzy, pale, nosebleed above 155/102.

  1. Low: restore blood volume, treat sepsis, warm up, cut back on opiates. Vasopressin raises it.
  2. High: stop overdrinking, cool down from cold, let thick blood settle. Sodium nitroprusside lowers it.
  3. Above 180 systolic there is a 2% chance per second of stroke.
  • Blood bag
  • Vasopressin
  • Sodium nitroprusside
Full guide: blood pressure too low or high →
Brain damage Serious

Signs: Screen distortion, mirrored controls, random ragdolls, vomiting and garbled text, starting below 95% brain health.

  1. Braingrow repairs it, in small doses only: overdosing is dangerous.
  2. Otherwise it heals slowly, about 11% per hour.
  3. Prevent it: makeshift helmet, then bicycle or riot helmet. Keep oxygen up.
  • Braingrow
  • Makeshift helmet (INT 8)
  • Bicycle helmet (INT 13)
  • Riot helmet (INT 17)
Full guide: brain damage →
Pain & shock Serious

Signs: Red vignette. Severe pain above 55, agony above 80. Pain shock above 66% knocks you out.

  1. Painkillers, morphine or fentanyl. Watch opiate overdose.
  2. An ice pack speeds pain recovery by 150% and never runs out.
  3. Treat the cause: dislocations, fractures and shrapnel hurt until fixed.
  • Painkillers
  • Morphine (INT 9)
  • Fentanyl (INT 11)
  • Ice pack
Full guide: pain & shock →
Unconscious / concussed Serious

Signs: Blurring and darkening below 70% consciousness. Below 30% you cannot act. Concussed when head muscle health drops under about 14%.

  1. Find the cap: oxygen, blood pressure, pain, energy, temperature or brain health each limit consciousness.
  2. Concussion lifts when the head heals: head muscle heals 10x faster while concussed.
  3. Stimulants raise consciousness short-term.
  • Stimulants
  • Bruise kit
Full guide: unconscious / concussed →
Radiation sickness Serious

Signs: Radiation icon filling, rising sickness, blood loss above 3 Gy, random infections and brain hits above 9 Gy.

  1. Get away from spent fuel, waste barrels and toxirock.
  2. Take anti-rad (you can overdose).
  3. Check "clean water" closely: a radioactive variant exists.
  • Anti-rad
  • Geiger counter
Full guide: radiation sickness →
Too cold / too hot Serious

Signs: Chilly below 35.5°C, hypothermia lower. Hot above 39°C, heatstroke above 41.5°C costs brain health.

  1. Cold: dry off, use a pod heater, campfire or ion space heater, wear insulation, keep eating.
  2. Hot: drop scarves and wraps, get wet, drink, eat ice cream.
  3. An ice pack cools 1°C per use.
  • Firestarter (INT 8)
  • Sleeping bag
  • Ice pack
Full guide: too cold / too hot →
Low mood Serious

Signs: Feeling down below -10: actions start failing. Depressed below -50. Miserable below -75 blocks most medical items.

  1. Eat good food, sleep, eat naptails, hug or trade with friendly survivors.
  2. Hold a relief or soothing crystal shard. Carry a plushie.
  3. Fix pain, hunger, thirst, cold and wetness: each drags mood down.
  • Naptail
  • Plushie
  • Relief crystal shard
Full guide: low mood →
Dislocation Minor

Signs: Trembling joint icon, bent posture, pain when you jump or swing with that limb.

  1. Click "Fix dislocation" and drag a wrench onto it: far less pain per push.
  2. Bare-handed each push hurts (+15 to 24 pain) and can fracture the limb. Not allowed above 75% pain.
  3. No wrench: a splint speeds healing, a bruise kit heals it.
  • Wrench (INT 12)
  • Splint
  • Bruise kit (INT 10)
Full guide: dislocation →
Shrapnel / glass shards Minor

Signs: Rubble or shard icons on a limb. Glass shards show in the feet. The limb will not stop bleeding or heal on its own.

  1. Click "Remove shrapnel" and pull each piece out slowly and straight.
  2. Tweezers remove the speed limit: only sideways wobble fails.
  3. Bandage afterwards. Wear sandals or boots to avoid glass.
  • Tweezers (INT 9)
  • Wood sandals (INT 8)
  • Painkillers
Full guide: shrapnel / glass shards →
Venom / toxicosis Minor

Signs: Toxicosis moodles after bites. Shade crawlers add 20 venom per bite, overgrown ticks 14, cave ticks 1.

  1. Antivenom removes 80 per 100 ml.
  2. An L.R.D. removes 12.
  3. Often you just wait it out while topping up blood.
  • Antivenom
  • L.R.D.
Full guide: venom / toxicosis →
Sickness & vomiting Minor

Signs: Nauseous moodles, screen darkening before a vomit. Vomiting costs hunger, thirst and mood.

  1. Stop what caused it: groundwater, raw meat, eating past full, chocolate (Experiment and Milky).
  2. Purple herb lowers sickness. Painkillers delay vomiting.
  3. Boil or filter water before drinking.
  • Purple herb
  • Filter straw
Full guide: sickness & vomiting →

The descent

11 layers down

Each layer is about 307 m deep. Bars show the layer's ambient temperature, from -35°C to 45°C. Every layer in detail →

  1. 01 Gravel lands 0m 13 to 19°C
  2. 02 Deeper gravel lands 307m 12 to 21°C
  3. 03 Dried desert 614m 13 to 33°C
  4. 04 Wasteland 922m -20 to 39°C
  5. 05 Overgrown depths 1229m 18 to 31°C
  6. 06 Frozen chasm 1536m -33 to -24°C
  7. 07 Fungal pools 1843m 14 to 23°C
  8. 08 Crystalline hollow 2150m 17 to 21°C
  9. 09 Geothermal vents 2458m 35 to 43°C
  10. 10 WHERE WE MUST REACH 2765m 15°C
  11. 11 CRIMSON ASCENT 3072m 16 to 23°C

Files

Every guide

BAS-01 · START HEREBeginner guide: your first runThe drop pod, the canteen, bags, light, and how to use the first two layers to stock up.

Treat injuries

MED-00Medical & triagePick the symptom or body part, get the fix. Every moodle and what it means.MED-01Bleeding & blood lossDressings, tourniquets, blood bags and how fast you can bleed out.MED-02Internal bleedingStop internal bleeding and drain a hemothorax before it stops your lungs.MED-03Infection & sepsisDisinfect early, treat sepsis, and when amputation is the right call.MED-04Fractures, dislocations & shrapnelFix a dislocation with a wrench, heal broken bones, pull glass shards.MED-05Heart, blood pressure & strokeFibrillation, cardiac arrest, CPR, defibrillators, blood pressure and viscosity.MED-06Brain damageWhat lowers brain health, what each stage does, and how Braingrow helps.

Survive

PSY-01Mood & last standHow to raise happiness, what low mood does, and your last stand odds.BIO-01Food, water, heat & sleepSafe water, food that matters, staying warm or cool, sleep and washing.

The descent

GEO-01All 11 layersEvery layer from Gravel lands to Crimson Ascent, with temperatures and threats.SUB-01CharactersExperiment, Milky and Dune: stats, quirks and how to unlock each one.END-01EndingsAll 3 endings and how to reach each one. Spoilers are folded away.

Reference

FAB-01Crafting & INT plannerHow crafting works, liquids, and which recipes each INT level unlocks.SKL-01Skills: INT, STR, RESHow to raise Intelligence, Strength and Resilience, and what each does.CFG-01Run settings & difficultyTough, Relaxed, Paradise, Desolate, Unchipped and Endless compared.SYS-01Console commandsOpen the console, the useful commands, and what disables achievements.SYS-02Saving & save filesWhen the game saves, save and quit mid-layer, and where the file lives.ACH-01AchievementsThe 26 listed Steam achievements with global unlock rates, and the hidden ones.MOD-01Mods & multiplayerThere is no official co-op. What the multiplayer mod is and how mods install.FAQ-01FAQPrice, platforms, Steam Deck, controller, demo, length and content warnings.LOG-01Updates & patch notesDated log of official posts from the reveal to Release 1.0.

Short answers

Quick questions

What is Casualties: Unknown?

A 2D cave-exploration survival simulator by Orsoniks, published by Oro Interactive. You play a disposable test subject sent to retrieve lost cargo from 11 layers of an alien planet, with a fully simulated limb and cardiovascular system. It began as the free itch.io game Scav Prototype.

When did Casualties: Unknown come out and how much is it?

Release 1.0 launched on Steam on November 9, 2026 for US$22.99; regional prices and sales vary, so check the Steam page. A free demo with layers 1 to 5 stays on Steam but is no longer updated.

How many characters and endings are there?

Three characters (the Experiment, Milky and Dune), each unlocked by finishing a run with the previous one, and three endings: the bio-pod, escape and M.E.R.C. endings.

Can you save in Casualties: Unknown?

Only between layers: at the bottom of a layer choose save and quit. Mid-layer you can type saveandquit in the console (the ~ key), which restarts you at the top of that layer but disables achievements.

More answers: Steam Deck, controller, demo, length →

Log

Latest

  • This wiki launchedFirst version, checked against the 1.0 patch notes, the Steam store page, Steam achievements and the community wiki.
  • Release 1.0Layers 6 to 11, endings, Milky and Dune, prosthetics, endless mode, item colours and labels, more run settings and console commands, 40 achievements. Console commands outside the sandbox now disable achievements.
  • Launch date announcedNovember 9 at 3pm CET, US$22.99 with a 15% launch discount. The demo stays up but will not be updated.
  • September progress update10 main layers, an 11th shorter layer and an optional bonus ending sequence. 3 characters, each unlocked by finishing a run with the previous one. Prosthetics in 3 tiers.
  • Simplified ChineseOfficial Simplified Chinese translation added to the demo.

All updates →