Prototype 2 Failed To Save Data Fix [Secure]

To effectively resolve the error, one must understand the two primary failure points inherent in the game’s architecture:

If you bought Prototype 2 on rather than Steam, you have a unique problem. The GOG version is notoriously DRM-free, but its cloud sync implementation is fragile. If you see the “failed to save” error on GOG: prototype 2 failed to save data fix