Right-click your ACUnity.exe , go to Properties > Compatibility , and check Run this program as an administrator . This gives the game permission to write save data to the C: drive.

If your game starts from the beginning every time you launch it, follow these steps:

Ensure your save file version matches your game version (e.g., v1.5.0).


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Experiencing a black screen or freeze in full-screen mode? Just click on the game screen to resume normal play.

Try Refresh the page if you encounter black screen.