Download through the official Steam entries: full game app 4576490 or demo app 4576510. The developer also has an itch page under the older scav-prototype address; its listed demo package is a different version.
Minimum requirements shown by Steam
The current full-game store snapshot lists a 64-bit processor and operating system, Windows 10, Intel Core i3-8130U 2.20 GHz and 500 MB available storage. It names support for 16:9, 16:10 and ultrawide screens.
The captured requirements do not provide a complete performance benchmark. Do not translate those values into a promised framerate or assume unsupported platforms have a native build.
Before adding anything
Launch the unmodified edition first and record its version. Confirm the correct Steam local-files directory before installing a mod or language file. The full game and demo have different app IDs, so selecting the wrong entry is an easy way to modify the wrong folder.
Older names and packages
Scav Prototype is the project’s earlier name and still appears in community paths. It is useful for finding historical materials, but not evidence that an old archive contains current release content.
Use demo versus full game to compare scope and mod compatibility before adding third-party files.
Sources & version notes
Reviewed against the primary sources below. Version-dependent details are identified in the article; these procedures have not been personally playtested.
- Official Steam store: Casualties: Unknown (2026-11-11 checked)
- Orsoniks: original Scav Prototype / Casualties: Unknown page (2026-11-11 checked)
- Official Release 1.0 Patchnotes (2026-11-09)
Compiled from public sources. We have not personally played or tested these procedures. Check your installed build and its tooltips when details differ.