PC shutting off in games,

Whenever I play games like fortnite or something the game will suddenly crash and the pc shuts down entirely, no blue screen or anything. It cycles through the ASUS "Automatic Repair" and "Diagnosing your PC" for about 20 minutes before I have to shut it down, flip to the off switch, unplug it, and wait a few minutes before plugging it back in and it usually goes straight to windows. I checked event viewer and it just says Kernel-Power - Event ID 41 and that it just lost power unexpectedly. The PC works fine if I am just doing homework however.

What could be causing this issue? Any help is appreciated.