How to Install Casualties: Unknown Mods on Version 1.0

This is a community procedure, not an official one

The install steps below are community-reported. A guide covering mods and BepInEx explicitly says it is not an official installation method and does not confirm that every mod uses the same framework. The FAQ likewise groups mod setup under BepInEx. Back up your saves separately before changing any files, and change one thing at a time so you can tell what caused a problem.

Get to the right folder

The video tutorial starts from a Steam copy of the game: right-click the title in your library, open Manage, and choose the local files view. A written install guide makes the same point from the other direction — that view takes you to the installation whose files you are about to modify, avoiding confusion with an unrelated folder holding an unextracted archive or an older build. Several multiplayer tutorials also begin by requiring the Steam version, so this is the safest starting point.

Two downloads, one launcher pass

The tutorial describes two separate downloads, one being BepInEx and the other the mod itself. Launch the game once and close it so the loader can create its folders before you copy anything in. Skipping that pass is a common reason the expected directories are missing.

Place the files

After extracting both archives, the tutorial opens the mod folder, copies its contents and pastes them where BepInEx was placed. A second tutorial creates a plugins folder inside the loader directory and moves the files there. Once the game-side files are in place, the leftover downloaded archives can be discarded. Keep a note of the exact files and versions you used.

Before you try co-op

If your goal is playing with friends, continue with the multiplayer setup page. Remember that a modded host needs clients with the same mod installed, and that the release page documents which game build the current guides were written against.

What is not verified

No file operation was performed on a live installation while compiling this page. Verifying game files may not remove every third-party file, and removing a mod may not reverse changes already written to a save. Neither outcome should be assumed.