To fix and create new save files in One Punch Man: A Hero Nobody Knows, you should first disable Steam Cloud in the game’s properties, delete the “OPMSaveData” file from your Steam userdata folder (specifically within folder 991560), and then restart the game to prompt a fresh save creation. Once the game is running, you can re-enable Steam Cloud to sync your new, uncorrupted progress.
Alternatively, you can resolve persistent corrupted file warnings by clearing your Steam download cache or by deleting the entire “991560” folder to force the game to generate a completely new save directory. Note that deleting the folder will reset all settings to default, so it is recommended to back up your data before proceeding with this method.
OPM: A Hero Nobody Knows – Create and Fix New Save Files
Method 1
Right-click on the game and click on properties from the Steam app.
- Click on the UPDATES tab and uncheck the steam cloud box located under it.
- Go to Steams’ install folder\userdata\…………\991560\remote
- Delete the File named OPMSaveData
- Upon starting the game, a message should pop up asking you to delete the corrupted file. Simply click Yes to delete it.
- Keeping the game on like this, again go to the Steam Cloud option and Turn it on.
If you do these correctly you can now create and save your new character with the Steam Cloud sync.
How to FIX Corrupted Save Files
- Open Settings from the Steam App.
- Click on the “Downloads” tab.
- Then, simply click on Clear Download Cache.
- The above steps should hopefully fix your Corrupted File warning coming up every time you start the game.
Method 2
- One other alternative is to Delete Folder 991560 entirely.
- After doing that, simply start your game again, and a new save file/folder should be created automatically.
- Please keep in mind that doing this method will reset everything to default so take a screenshot or save your settings somewhere.
We recommend that you create a backup of this folder. In case of any mishap, simply restore the folder and all should be good.
If the problem persists after trying all the above methods and fixes, kindly write to the developers from here.
If you have any questions or suggestions regarding the post, do let us know in the comments below so that we can respond to it ASAP. That will conclude this short guide/fix on OPM: A Hero Nobody Knows saves/corrupted files.
Last Updated on February 26, 2026
A computer science graduate by qualification, Zoid loves to keep himself updated with the latest gaming content related to PC, Android, and other platforms as well. Likes to keep his diet and health in check from time to time!