Restore from the game's own backup
Symptom
You want to roll back to one of the backups the game made itself.
Steps marked “changes files” delete, rename or overwrite something. Back up the whole save folder first.
Quit the game. To stop Steam overwriting your copy, also turn off Steam Cloud for the game: Library > right-click the game > Properties > General > Steam Cloud.changes files
Copy your whole current
...\b1\Saved\SaveGamesfolder somewhere safe first.Open
...\b1\Saved\SaveGamesBackup. It has three subfolders:01RealtimeBackup(in-game time points, holds about 6, the newest overwrites the oldest),02HourlyBackup(about 12 hours' worth),03DailyBackup(one per calendar day).Pick the backup closest to the progress you want. Steam achievement unlock times can help you date it.
Copy ALL the files from that backup folder into
...\b1\Saved\SaveGames\<your Steam ID>, overwriting the existing.savfiles.changes filesStart the game and load the slot. On WeGame the steps are the same, just with the
WeGameApps\rail_apps\BlackMythWukong(2002122)path.Check: The slot loads with the older progress you picked.
Unverified: The backup counts above come from a single guide and haven't been confirmed by the developer.