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Casualties: Unknown – PC Game – Free – Direct Link – Torrent
Casualties: Unknown (formerly known as Scav Prototype) is an unforgiving 2D cave-exploration survival game from Polish solo developer Orsoniks, published by Oro Interactive. You play as an Experiment sent to an alien planet to retrieve lost cargo, descending through 11 hostile layers while managing bleeding, infections, hunger and your own mood. It launched on Steam on 9 November 2026 and is rated Overwhelmingly Positive. It also deals with very dark themes, so read the content notes below first.
Game Info
| Genre | Action/Adventure/Simulation/Horror |
| Developer | Orsoniks |
| Publisher | Oro Interactive |
| Release Date | 9 Nov, 2026 |
| Modes | Single-player |
| Platforms | Microsoft Windows |
| Game Size | 725 MB |
Casualties: Unknown Gameplay
You are one of thousands of test subjects, and you were sent down here to die. That’s how the game describes itself, and it isn’t exaggerating. Casualties: Unknown drops you onto an alien planet as an artificially created Experiment, with orders from your captors to retrieve lost cargo from the depths. The only way forward is down, through eleven layers of caves that get more dangerous the deeper you go.
What makes it stand out is how seriously it takes the human body. The game simulates a full cardiovascular and limb damage system, so injuries aren’t just a health bar going down. You’ll bandage wounds, fight infections and stabilize blood loss before you pass out, and your mood matters too: too much doom and gloom makes survival harder. Each layer brings its own hazards, from the terrain to the creatures, so you’re constantly adapting. Commentators have described the loop as a mix of cave exploration and the board game Operation, which captures the tension of carefully handling something that can go very wrong.
You aren’t helpless, though. You can craft tools to travel more efficiently, and the flora provides materials to patch yourself up if you start bleeding out. Previous expeditions left loot behind, but even helpful items can get you killed. Across the game there are around 300 items to find, three characters with distinct playstyles and traits to level up, including Intelligence, Strength and Resilience. You can also adjust loot and danger values from the main menu, which lets you tune the challenge to your taste. And somewhere at the bottom, there’s a question about what’s actually at the end of this journey.
A frank content note: the developers describe the game as hardcore survival simulation that touches on depression, violence, dismemberment, drug use and self-harm, and they advise player discretion. If those themes are a concern, it’s worth skipping or trying the free demo first. For players who enjoy punishing, atmospheric survival, it’s one of the most talked-about launches of the month, with a 97% positive rating across more than 900 reviews.
Key Features
- A fully simulated cardiovascular and limb damage system.
- 11 layers of an alien planet, each with its own challenges and dangers.
- Robust crafting mechanics and around 300 items to find.
- Three characters with distinct playstyles, plus Intelligence, Strength and Resilience traits.
- Adjustable loot and danger values on the main menu.
- Multiple endings, permadeath and procedural generation.
- Free demo available, plus a separate soundtrack.
Pros & Cons
| Pros | Cons |
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ScreenShots
System Requirements
Minimum specs, as listed by the developer. No recommended specs are published.
| OS | Windows 10 (64-bit) |
| CPU | Intel Core i3-8130U 2.20 GHz |
| Storage | 500 MB available space |
| Additional | 16:9, 16:10 and ultrawide screens supported |
Frequently Asked Questions
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What is Casualties: Unknown?
It’s a 2D cave-exploration survival game where you control an Experiment descending through 11 alien layers, managing injuries, hunger and mood while retrieving lost cargo.
Was it called something else?
Yes. It was formerly known as Scav Prototype.
Is there a demo?
Yes, there’s a free Casualties: Unknown Demo on Steam.
Does it have mature content?
Yes. The developers say it touches on depression, violence, dismemberment, drug use and self-harm, and advise player discretion.
Is it difficult?
Very. It’s tagged as Difficult and has permadeath, though you can adjust loot and danger values from the main menu.
What languages does it support?
English and Simplified Chinese interface and subtitles.
Can my PC run it?
Very likely. The minimum is a 64-bit Windows 10 PC with an Intel Core i3-8130U 2.20 GHz and 500 MB of storage.
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