Choose mods by their author’s stated target, not by a generic “latest” label. Full game 1.0 and demo 7.0.1 are separate compatibility targets, and a working multiplayer package does not prove other plugins work alongside it.
Check before installing
Read the mod’s source page, exact release, required loader and known incompatibilities. Save the package name and version. Keep a backup of valuable saves and note which files the package replaces.
The Casualties Together README names BepInEx 5.4.23.5 x64, but that is a requirement for that project, not proof that every skin or mod uses the same setup.
Test one change at a time
Start with the necessary loader and one compatible mod. Confirm the expected interface or feature before adding another. If a change fails, you then have a useful boundary to investigate.
Do not merge demo and full-game installation directories or assume a mod manager automatically resolves compatibility.
Skins and custom sprites
A cosmetic package can still replace version-sensitive files or depend on a plugin. This guide does not publish a universal skin-install path without the chosen package’s instructions. Check its target and removal process first.
Use the multiplayer install guide for that specific project, or mod recovery when an installation stops launching.
Sources & version notes
Reviewed against the primary sources below. Version-dependent details are identified in the article; these procedures have not been personally playtested.
- Casualties Together author installation and features (2026-11-11 checked)
- Casualties Together versioned releases, including v5.5.0 (2026-11-10 / checked 2026-11-11)
- Official Steam store: Casualties: Unknown (2026-11-11 checked)
Compiled from public sources. We have not personally played or tested these procedures. Check your installed build and its tooltips when details differ.