Casualties: Unknown
Orsoniks · published by Oro Interactive · released Nov 9, 2026
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.
Price
-15%$19.54
$22.99
Reviews
97%
2,748 · Overwhelmingly Positive
Playing now
5,046
sampled 13m ago
24h peak
6,110
all-time seen 6,280
Followers
33,482
20h ago
Owners (est.)
~82.4K
41.2K – 132K
YouTube activity
50
videos · 30 d76
creators5.4M
views · 1 yTwitch activity 177 watching · 13 live
592
avg viewers · 30 d60.4K
hours watched · 30 d638
streamers · 30 dProduct info
from Steam's PICS · read 3h ago- Change number
- 40,938,546 · seen 3h ago
- Public build
- 26,590,676 · Nov 11, 2026 (2d ago)
- Operating systems
- windows
- Architecture
- 64-bit
- Install size
- 645 MB · 375 MB download
- Install folder
Casualties Unknown- Controller support
- —
- Metacritic
- —
- Homepage
- —
- Release state
- released
- Community
- hub · stats
Steam Deck
PlayableTested Nov 13, 2026 on build 26,136,173
- !Default controller config not fully functional
- !Controller glyphs do not match deck device
- !Text input does not automatically invokes keyboard
- !Interface text is not legible
- !Multi window app automatically sets focus
- ✓Default configuration is performant
Branches · 2
every build Steam serves for this app| Branch | Build | Updated | Description |
|---|---|---|---|
| public | 26,590,676 | Nov 11, 2026 · 2d ago | |
| oldver | 25,545,677 | Sep 26, 2026 · 1mo ago | This branch won't be updated |
Build history
every build id we have seen on a branch (history starts with our first read)| Build | Branch | Released | First seen |
|---|---|---|---|
| 26,590,676 | public | Nov 11, 2026 12:14 | 2d ago |
| 26,525,321 | public | Nov 8, 2026 19:34 | 4d ago |
| 25,545,677 | oldver | Sep 26, 2026 10:17 | 4d ago |
Depots · 1
content of the public branch| Depot | Name | OS | Language | DLC / shared | Size | Download | Manifest |
|---|---|---|---|---|---|---|---|
| 4576491 | all | 645 MB | 375 MB | 4259866568700524104 |
Launch options · 1
| Executable | OS | Description |
|---|---|---|
CasualtiesUnknown.exe |
all |
Languages · 2
| Language | Interface | Full audio | Subtitles |
|---|---|---|---|
| English | ✓ | — | ✓ |
| Simplified Chinese | ✓ | — | ✓ |
Packages · 1
all packages| Sub | Name | Billing | Price |
|---|---|---|---|
| 1595243 | Casualties: Unknown | Store or CD key | -15%$19.54 |
Bundles · 4
all bundles| Bundle | Games | Bundle discount | Price |
|---|---|---|---|
| Palworld + Casualties: Unknown | 2 | -10% | $44.58 |
| Rain World + Casualties: Unknown | 2 | -10% | $40.08 |
| Abiotic Factor x Casualties: Unknown | 2 | -10% | $49.08 |
| Casualties Unkown x Barotrauma | 2 | -10% | $49.08 |
Change numbers
all changes#40,938,546 · 3h ago#40,927,899 · 11h ago#40,904,644 · 23h ago#40,899,713 · 1d ago#40,896,023 · 1d ago#40,893,998 · 1d ago#40,887,610 · 1d ago#40,879,360 · 1d ago#40,839,287 · 2d ago#40,831,907 · 2d ago#40,786,600 · 3d ago#40,781,123 · 4d ago#40,775,996 · 4d ago
Updates · patch notes
Steam announcements tagged as patch notes, linked to the public build they followed
| When | Note | Build | Update size |
|---|---|---|---|
| Nov 9, 2026 | Release 1.0 Patchnotes (NOTE: This list is incomplete - many smaller changes are not documented here) ADDITIONS - Layers 6-11 - Endings - 2 new playable characters - Rewrote and added more ePDAs - ePDA notes no longer repeat until you've exhausted all of them - Endless mode - Item customization (colors & labeling, see crafting tutorial) - You can boil lumalgae down into bio-chem now - Attacking enemies now uses a wider |
26,525,321 | 615.5 MB total |
| Apr 23, 2026 | 6.1 Demo Patch Notes ADDITIONS - The two advanced courses are now locked behind layer requirements, reach layer 2 for First Aid, reach layer 3 for Crafting (so new players dont spend an hour straight on tutorials - it's meant to be a knowledge fill after you already felt out the basics) - You can skip through the first part of the First Aid Course by barking - E-PDAs give 50 INT experience when read for the first time |
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| Apr 20, 2026 | Casualties: Unknown v6.0 Patch Notes ADDITIONS- Entirely reworked and expanded cardiovascular simulation, with many more variables and possible effects. This changes almost everything related to your body. - 2 types of defribrillators - 4 new medicine types, with 3 new drug items - Auto-pump rework- Reworked tutorial with multiple new courses and a simple sandbox- New liquids and drug items related to the heart- Added more sounds to |
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