The "D3D Device Crash" in God of War (and God of War Ragnarök ) is a common DirectX error that occurs when the game loses communication with your graphics card. This often manifests as a "DXGI_ERROR_DEVICE_HUNG" or "The graphics device crashed" message.

The most frequent culprit, especially if you haven't updated for a major game launch.

Use (Display Driver Uninstaller) in Safe Mode, then reinstall the latest driver. Do not install GeForce Experience if using NVIDIA (it can interfere).