If you’re trying to unlock every achievement in Casualties: Unknown, this guide covers the requirements and tips for all 40 achievements listed in the original source. Some are unlocked naturally as you progress through the game, while others require specific actions, difficult challenges, or hidden interactions.
I’ve separated the achievements into four sections so you can find what you’re missing more easily. You’ll find progression achievements first, followed by challenges, regular gameplay achievements, and secret achievements.
Spoilers ahead! Some of the instructions reveal story endings, later areas, and hidden objectives. A few achievements also have unclear requirements in the source, so I’ve marked those instead of guessing at a solution.
Casualties Unknown Achievement Guide – All 40 Achievements
These achievements are connected to completing missions, reaching specific layers, and unlocking different endings or characters.
Company’s Best
Requirement: Complete the mission.
Finish the game using the Bio-pod ending. You need to complete the game with the chip to unlock this achievement.
Millions to One
Requirement: Obtain the cargo.
Reach and finish Layer 10 to obtain the cargo and unlock the achievement.
Consolation Prize
Requirement: Over halfway there.
Reach Layer 5 or Layer 6. The original source isn’t certain which of these two layers triggers the achievement, so you may need to progress further if it doesn’t unlock at Layer 5.
Cannon Fodder
Requirement: Finish a run as an Experiment.
Complete a run with the Experiment character. Any ending counts.
Unlocks: Milky.
The Marksman
Requirement: Finish a run as Milky.
Complete a run while playing as Milky. You can use any ending.
Unlocks: Dune.
The Cannibal
Requirement: Finish a run as Dune.
Complete a run with Dune. Any ending will count.
Company’s Worst
Requirement: Get your freedom.
This achievement requires the Escape ending.
- Start an unchipped run.
- Bring a gun with you to the lab.
- After the scientist finishes the dialogue, kill them.
- Escape the lab to complete this ending.
The original guide recommends watching a video walkthrough if you need help with the escape sequence.
To Be Continued…
Requirement: Fail the mission catastrophically.
You need to unlock the Mercenary ending. Before attempting this, make sure you’ve completed either the Bio-pod or Escape ending at least once.
Follow these steps:
- Start a chipped run and bring a gun to the lab.
- After leaving the life-pod, go down and find a Tech-Ball.
- Break the Tech-Ball and collect the Nano-tech Scanner it drops.
- Use the scanner before leaving the first layer.
- Keep the Nano-tech Scanner in your inventory throughout the run. It will help you locate the chips required for the M.E.R.C. scarf.
Collect these six chips from the specified layers:
- Layer 2: REL-Hyper-Regeneration Booster chip
- Layer 3: Micro-SINGLEBTR 1CHRG capacitor
- Layer 4: 0.2.9-Mind-Swap chip
- Layer 5: 0.0.7-Emergency Rejuvenation chip
- Layer 7: MINI-AI chip
- Layer 9: Kinetic Transmitter chip
Once you have all six chips, craft the M.E.R.C. scarf using:
- 1 Scarf
- 1 Circuit Board
- All six required chips
The recipe requires 18 INT.
Reach the surface with the M.E.R.C. scarf anywhere in your inventory to unlock the Mercenary ending and this achievement.
Challenge Achievements
These achievements require more specific tasks, higher character stats, boss fights, or completing runs under certain conditions.
TOP OF THE FOOD CHAIN
Requirement: Become the apex predator.
Kill the Elder Thornback boss in the Overgrown Depths.
The original guide recommends using two Dynamites to make the fight easier.
Survival Veteran
Requirement: Reach level 16 in each skill.
Raise every skill to level 16. The original guide suggests trying Endless mode as a potentially easier way to work toward this achievement.
Not a Care in the World
Requirement: Reach maximum happiness.
Find a Mini-barrel containing a large amount of Fentanyl and drink it. The source suggests this should unlock the achievement, but doesn’t provide a confirmed quantity or further requirements.
Leukocyte Overflow
Requirement: Have 200% immunity.
Look for a Mini-barrel containing a large amount of Antibiotics and drink it. The original guide suggests this can help you reach the required 200% immunity.
In and Out
Requirement: Beat the game in under 3 hours of in-game time.
Complete the game before the in-game timer reaches three hours.
Using a Drill Pod can help you skip some layers and save time.
Lightfooted
Requirement: Complete a layer without ragdolling from a fall.
Finish an entire layer without ragdolling because of a fall. The first layer is suggested as the easiest place to attempt this, provided you move carefully.
Heavy Metal
Requirement: Smelt a titanium slab.
Craft a Titanium Slab using the following materials and item qualities:
- Ilmenite Chunk
- 50 mL Bio-chem Fluid
- Any item with Hammering quality
- Any item with Cutting quality
Certainty of Steel
Requirement: Have four P.E.O. limbs attached simultaneously.
You need to attach four P.E.O. limbs at the same time. The original guide suggests trying Endless mode and collecting the required materials.
The listed crafting requirements are:
- Titanium Slab with at least 90% condition
- 3 Titanium Sheets
- 2 Chunks of Plastic
- 2 Circuit Boards with at least 90% condition
- Bundle of Wires with at least 90% condition
- Any item with Nails quality, at least 100% condition
- At least 30 mL Bio-chem Fluid
- Any item with Hammering quality
- Any item with Cutting quality
The source also mentions losing limbs and attaching replacement parts, but doesn’t explain the complete process for obtaining all four P.E.O. limbs.
…
Requirement: Become hollow.
The original guide doesn’t provide a confirmed method for this achievement. It suggests that it might be connected to the Crystalline Hollow area, but this has not been established.
Center of Attention
Requirement: Have six manifestations active at once.
Manifestations are enemies found in the Crystalline Hollow layer. You need to have six active simultaneously to unlock this achievement.
Pacifist
Requirement: Kill no guards during the escape sequence.
Complete the escape sequence without killing any guards. Focus on getting away rather than fighting them.
Round and Round We Go…
Requirement: Loop an Endless run twice.
Complete two loops in an Endless run to unlock this achievement.
Gameplay Achievements
These achievements are generally tied to actions you can perform during normal gameplay, including combat, healing, crafting, and interacting with equipment.
Transhumanist
Requirement: Replace missing limbs with prosthetics.
Replace your missing body parts with prosthetic limbs to unlock the achievement.
Playing With Fire
Requirement: Fire a shot from any weapon.
Use any weapon and fire at least one shot.
It Refused
Requirement: Get the Last Stand effect after death.
You need to reach the Last Stand state with the following conditions:
- Brain integrity must be 15% or lower.
- Brain integrity must remain above 0%.
- Consciousness must be below 30%.
Hoarder
Requirement: Reach 100% overencumbrance without using Mini-barrels.
Collect enough items to reach 100% overencumbrance. Mini-barrels do not count for this achievement.
‘Tis but a Scratch!
Requirement: Survive a bite from an Elder Thornback.
Get bitten by an Elder Thornback and survive for a couple of minutes afterward.
My Survival Over Yours
Requirement: Kill another survivor.
Find and kill any survivor to unlock this achievement.
Ain’t That a Kick to the Head
Requirement: Survive a gunshot wound to the head.
Take a gunshot wound to the head and remain alive for a couple of minutes afterward.
Neural Enhancement
Requirement: Use a neural booster.
Use a Neural Booster during your run.
Expected Outcome
Requirement: Die.
Simply die during a run to unlock this achievement.
Good as New
Requirement: Heal a fracture.
Use a splint to fix a broken or fractured limb.
Graduate
Requirement: Finish all training courses.
Complete every training course in the game.
Express Route
Requirement: Use a Drill Pod.
Craft a Drill Repair Kit and find a Drill Pod. Use it to unlock the achievement.
Dead Man Walking
Requirement: Restart a stopped heart.
Use an Automated External Defibrillator (AED) to restart a stopped heart.
Thermal Camouflage
Requirement: Sneak past a turret through unconventional means.
Turrets react to warm temperatures, so you need to make your body cold enough to sneak past one.
The original guide mentions the temperature-related condition as “QCold” but doesn’t explain the exact steps or items needed to achieve it.
Real Suck-Up
Requirement: Reach maximum reputation with a survivor.
Build your reputation with a survivor until it reaches the maximum level.
Secret Achievements
These achievements have hidden requirements. Some can be unlocked through unusual interactions, while others are still unexplained in the original source.
Bright Idea
Requirement: Put a light bulb in your mouth.
Find a Light Bulb and put it in your mouth. The unusual interaction unlocks this achievement.
Level One Breach
Requirement: Break the glass in the tutorial.
During the tutorial, break the glass to unlock the achievement.
Wrong Way
Requirement: Go in the wrong direction.
Start a run and head upward instead of going down. Touch the invisible wall to unlock this achievement.
Reading Comprehension
Requirement: Unknown.
The original guide doesn’t explain how to unlock this achievement. Its requirement is still unclear.
What Have I Done..?
Requirement: Take your anger out on a little friend.
The original guide suggests that destroying a plush might unlock this achievement, but this is only a guess and has not been confirmed.
Achievements With Unconfirmed Requirements
A few achievements in this guide still need verified instructions:
- Consolation Prize: The source isn’t certain whether reaching Layer 5 or Layer 6 is required.
- …: The exact requirement for becoming hollow is unknown.
- Reading Comprehension: No unlock method is provided.
- What Have I Done..? Destroying a plush is only a suggested possibility.
- Thermal Camouflage: The cold-body approach is mentioned, but the exact method is missing.
These details may need updating once their requirements are confirmed.
