CASUALTIES: UNKNOWN
BUILD 1.0.1

Crashes and fixes

For launch or mod problems, start with the official Windows requirements and the community mod-loading checklist. For missing music, the wiki documents the Credits → Custom music folder and the MP3 player’s song menu. Patch 1.0.1 is dated 11 Nov 2026.

Fixes named in 1.0.1

Save-related reports

Before changing an installation or mod set, keep a separate copy of your existing files. This is an editorial precaution, rather than a repair for a documented save bug. When reporting a crash, record the game version, what happened immediately before the crash and whether mods were present. For modded installations, include BepInEx/LogOutput.log and the exact plugin versions in the report. The mod installation guide describes a reversible backup and rollback workflow.

Custom songs

The community MP3 player page documents a route to the correct folder: choose Credits from the main menu, then the musical-note Custom music button. That button opens the folder in the file browser. Add .mp3, .wav or .ogg files there. In the inventory, drag the MP3 player to the center to open its song menu; custom songs appear at the bottom. The item uses a small battery. Use the folder opened by the button instead of guessing an installation path.

If it does not launch

Compare your setup with Steam’s Windows 10 64-bit requirements and 500 MB of available storage. The 500 MB figure is a storage requirement, not the archive download size. For a mod-loading failure, the wiki recommends checking that BepInEx sits beside the executable, the plugin DLL is in BepInEx/plugins, and all required dependencies match the mod documentation. Keep these checks separate from the base game: a mod loader’s log diagnoses plugin startup, rather than every possible black screen.

Evidence status · checked 12 Nov 2026
TopicStatus
1.0.1 fixes and Windows requirementsOfficial Steam source; same publisher ecosystem
Custom music and plugin diagnostics1 community source
Backup and clear issue reportsEditorial troubleshooting procedure
Steam store screenshot 3 of Casualties: Unknown
Steam store screenshot 6 of Casualties: Unknown

Questions

What did 1.0.1 fix?

Container overflow, toxirock spawns, trader sleep, a Pacifist false fail, bad crystal teleports, and an easier cargo surgery, among the lines in the news post.

Sources