Before you can fix anything, you need to know where the game hides your data. In Windows, navigate to: C:\Users\[YourUserName]\AppData\Local\DarkSiren\Saved\SaveGames

Good news: As of March 2025, the developers released , which explicitly addresses the “dark siren save file fixed” issue. If your game is up to date, the patch does two things:

Navigate to: C:\Users\[YourUserName]\AppData\Local\DarkSiren\Saved\SaveGames You will see files named SaveSlot_0.sav , SaveSlot_1.sav , etc. Copy the entire folder to your desktop as a backup.