If you want to play games in VM you will probably need qemu/kvm and sepparate GPU for passthrough. Otherwise your VM will struggle to load anything serious. But I think others use that mostly to run windows apps on linux machine or simmilar. Maybe you can just dualboot from 2nd drive, it should be 100% safe if you unplug your main drive, but thats probably overkill. Im no expert, just putting it here so you can google