Fixing Prototype 2's data-loss issue required coordinated fixes across client, server, database, and infrastructure. Implementing idempotency, better error handling, timeouts alignment, and improved observability eliminated the failure mode and materially increased reliability. Applying these patterns proactively will reduce similar problems in future prototypes.
If your Documents folder is syncing with OneDrive, it can cause "file in use" errors that prevent saving. prototype 2 failed to save data fix
const handleSubmit = async (form) => if (isSubmitting) return; setIsSubmitting(true); const idempotencyKey = uuidv4(); try const res = await axios.post('/records', form, headers: 'Idempotency-Key': idempotencyKey ); showSuccess(res.data.id); finally setTimeout(() => setIsSubmitting(false), 500); If your Documents folder is syncing with OneDrive,
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: If you see the “failed to save” error
Let’s be real for a second. Prototype 2 is over a decade old. It is a victim of the “abandonware” era. Activision has moved on to Call of Duty and Crash Bandicoot . There will be no official patch.
: Browse to your game’s installation folder (typically C:\Program Files (x86)\Steam\steamapps\common\Prototype 2 ) and select prototype2.exe . 2. Run as Administrator