Navigate to the Compatibility tab.
Verify the integrity of game files via Steam to replace any corrupted core assets.
Under the General tab, find the Steam Cloud toggle. Turn it off: Switch the toggle to Off . prototype 2 failed to save data fix
Check only (limiting it to 4 cores). Click OK and return to the game.
For the most stubborn issues, the Prototype 2 community has created excellent fixes. Navigate to the Compatibility tab
Prototype 2 often fails to save data on modern Windows 10 and 11 systems because it cannot properly access the Documents folder due to modern security settings, administrative restrictions, or conflicts with high-core-count processors. 1. Grant Administrative Privileges
Permissions are the most common cause. You must ensure the game has full rights to write to your Documents folder. Turn it off: Switch the toggle to Off
(Alternative) If you want to keep the feature on, click Allow an app through Controlled folder access and add prototype2.exe to the allowed whitelist. 3. Verify Steam Cloud Conflicts