Are you playing the game on , a different digital storefront, or a physical disc? What version of Windows are you currently running?
Select and uncheck all but the first 4-8 cores. 🚀 Exclusive "Heavy Duty" Fix
If none of the above works, your user profile is fundamentally corrupted for this title. You have two choices:
Steam Cloud can occasionally sync corrupted metadata or overwrite local saves with blank files. Open your . Right-click Prototype 2 and select Properties . Under the General tab, locate the Steam Cloud section. prototype 2 failed to save data fix exclusive
Uncheck and select only CPU 0, CPU 1, CPU 2, and CPU 3 (limiting the game to 4 cores). Click OK and return to the game. Advanced Troubleshooting Recreate the Save Folder Structure
Whether you are using for your Documents folder.
For those still facing the issue on Windows 11 or seeking a permanent background fix, this section is for you. Dedicated modders have created powerful tools that go far beyond the standard fixes and directly address compatibility at a code level. Are you playing the game on , a
To fix this, create a new using standard alphanumeric English characters only. Log into the new account and run the game.
Do you use any software besides Windows Defender?
Long-term fix (recommended)
The game doesn't have "Administrator" rights to write files.
Alternatively, temporarily toggle to Off to test if it resolves the issue. 3. Create the Save Folder Manually
The folder will contain your save files ( slot-A.bin , slot-B.bin , etc.) and a profile.bin file that stores your game settings. 🚀 Exclusive "Heavy Duty" Fix If none of
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