This is a clean Windows 10 install with the latest BIOS version and intel/AMD drivers. The games I've played were TF2 and Wargame Red Dragon.
SFC /scannow did not find any corrupted files.
I have ran Memtest86+ about 1-2 weeks ago and ran 9 passes without any errors.
I have used command prompt to run "wmic" and "diskdrive get status", and chkdisk, and a SSD utility to confirm that the SSD was okay.
Event Viewer did not return any error messages that directly pointed to the cause of the hard reboot.
This is the only info that I have regarding the Event Viewer: http://imgur.com/LJ03DOF
A potential cause maybe the XTU undervolting that I did on the laptop, but the XTU undervolt has been stable for the past year. When the laptop does crash due to an undervolt issue, Event Viewer usually starts throwing WHEA and CPU logic check errors right before it crashes.