Casualties: Unknown

An unforgiving cave-exploration survival simulator across 11 hostile layers of an alien planet.

Released PC Simulation Adventure Strategy

9 Nov 2026 · Paid

About Casualties: Unknown

Survive a Harsh World Each layer brings its own challenges, adapt and descend. Simulated Limb and Cardiovascular Systems Injuries are unavoidable. You will have to bandage yourself, fight infected wounds, and stabilize blood loss before losing consciousness. Additionally, your mood can greatly affect your chances of survival, too much doom and gloom will make your life harder. Craft to Survive As a creature capable of reason, using tools will allow you to travel the cavernous layers more efficiently. In case you start bleeding out, the flora will provide great resources to patch yourself up. Explore at Your Own Risk Previous expeditions have left some good loot behind. But even helpful things can prove to be your death. Uncover the Truth What actually lies at the end of this journey? And what becomes of you if you are to succeed? Features • An entirely simulated cardiovascular and limb damage system • Character traits to increase on your run: Intelligence, Strength, and Resilience • Robust crafting mechanics to increase your odds of survival • 3 characters with their own distinct playstyles • 11 layers of an alien planet with their own challenges and dangers • 300 items to find on your runs • Adjustable loot and danger values accessible on the main menu

• Family Sharing

Gameplay

Casualties: Unknown is a two-dimensional single-player cave-exploration survival game where the player controls an artificially-created anthropomorphic test subject, called an Experiment, on a fictional hostile planet. The player is tasked with retrieving cargo lost by their human captors by descending down cave "layers". Each layer increases in difficulty and introduces additional hazards the player must avoid. The full game is planned to include eleven procedurally-generated underground layers. The game features a simulated limb and cardiovascular system, requiring the player to bandage wounds, treat infections and manage blood loss to avoid losing consciousness. The player character's mental state, or mood, is tracked as a survival mechanic alongside physical injury. Having too low mood can cause self-harm events of various severity, from clawing their own arm to ripping out their own eye. The game has character traits that the player can improve over a run: intelligence, strength and resilience. There are three unique playable characters, roughly 300 collectible items, and adjustable loot and danger settings accessible from the main menu.