Casualties:
Unknown
Descend into hostile alien caves as an expendable test subject sent to recover lost cargo. Learn to craft essential tools, manage injuries and survive the next layer.
Official trailer · Orsoniks · Game imagery © respective owners. Material credits.
Your Casualties: Unknown Journey
01Beginner GuideStart with the tutorial, learn the basic controls and prepare for your first descent into the caves.Official Steam screenshot · Game imagery © respective owners. Material credits.
02Crafting EssentialsLearn how crafting works and which supplies to gather for useful tools and dressings during your first runs.Official Steam screenshot · Game imagery © respective owners. Material credits.
03Bleeding & DressingsUnderstand wound care, blood loss and infection so you can make better decisions when your character gets hurt.Official Steam screenshot · Game imagery © respective owners. Material credits.
04Cave LayersPrepare for the hazards of each layer, starting with the five layers available in the free demo.Official Steam screenshot · Game imagery © respective owners. Material credits.
Prepare for your next descent
Start with the systems that shape every run: exploration, crafting and staying alive.
What is Casualties: Unknown?
Casualties: Unknown is a challenging 2D cave-exploration survival simulator by Orsoniks. You play a captive test subject searching an alien planet for lost cargo, gathering supplies and crafting tools as you descend.
Its detailed injury simulation makes wound care, blood loss and infection part of every survival decision. The free demo offers five layers, while the planned full release expands the journey to eleven layers with three playable characters and three endings.
Explore All GuidesSource: Oro Interactive · Developer announcements
Frequently asked questions
Official game facts, with the demo and planned full release kept separate.
- What is Casualties: Unknown?
- A challenging 2D cave-exploration survival simulator by Orsoniks, published by Oro Interactive. You are a test subject sent to recover lost cargo from an alien planet.
- Can I play it for free?
- Yes. The free Steam demo is available now and includes five cave layers. The full game is planned for November 9, 2026.
- How much content is planned for the full game?
- The official announcements list eleven cave layers, three playable characters, three endings and forty achievements. These are full-release plans, not a list of features unlocked in the demo.
- Does it have official multiplayer?
- Steam lists Casualties: Unknown as single-player. Community multiplayer mods are separate from the official game and are not official multiplayer support.
- Which platforms and languages are supported?
- The official Steam listing is for Windows PC and supports English and Simplified Chinese. Community translations are available separately; they are not officially approved localizations.
- Where should I start?
- Play the in-game tutorial before starting a run. Learn how crafting and dressings work, then take time to understand injuries, blood loss and the hazards of the first five demo layers.
Sources: Steam · Official website · Checked Nov 8, 2026
Ready to Survive Casualties: Unknown?
Prepare for your next descent with beginner tips, crafting help and wound-care guides. Start learning the systems, then put your knowledge to the test in the free demo.