Casualties: Unknown is an unforgiving cave-exploration survival simulator. Your captors have tasked you with retrieving lost cargo on a foreign planet, explore its 5 layers and do your best to survive diverse hostile environments. You are just one of the thousands of test subjects sent to die. Summary: IGDB
Mind Score
Fair to the player
Respect
90
Nourish
32
Stimulation
moderate
Unknown lengthStop anytime
On failure
Punishing: a death costs progress or a long way back
- IGDB keyword “permadeath”
- IGDB keyword “roguelite”
What it exercises
Exploration and curiosity
- IGDB keyword “exploration”
- Wikipedia: built around exploration
Medium confidence · 28 Sept 2026 · Rules-based estimate from the Steam store, player reviews and PEGI/ESRB descriptors. Not a substitute for the official rating or your own judgement. Tap a label to see the evidence.