Casualties: Unknown
Single-player
Steam 97%Steam: the share of players who recommend the game on Steam. Metascore: the average critic score on Metacritic, from 0 to 100.
Casualties: Unknown is an unforgiving cave-exploration survival simulator. Your captors have tasked you with retrieving lost cargo on a foreign planet, explore its 11 layers and do your best to survive diverse hostile environments. You are just one of the thousands of test subjects sent to die.
We haven't tested it yetWant to know how it runs on Linux and mini PCs? We test the most requested games first.0 asked for it
Official stores and keyshopsOfficial stores sell the key on behalf of the publisher (Steam, GOG, Humble…). Keyshops are third-party key resellers (Kinguin, Eneba, Instant Gaming…): they cost less but aren't the publisher's store, and support and refunds go through them. Check the key's platform and region and prefer sellers with many reviews. On Linux what matters is that it's a Steam key: the game starts with Proton just like one bought on Steam.
11 stores · updated 13 Nov, 14:59 · lowest first
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Prices in euros, for Europe. Prices updated on 13 November 2026 at 14:59. Price data provided by IsThereAnyDeal. Some links are affiliate links: if you buy through them IncastroPC may earn a small commission, at no extra cost to you.