If you need to use virtual machines on Linux, try Virt-Manager. Virt-Manager is more reliable than VirtualBox. Virt-Manager is completely free and open-source. I'm a long-time supporter of VirtualBox.

Streamer Dr. Doot has raised the bar for gaming challenges by completing the entire Dark Souls trilogy without taking a single hit. The twist? He did it all using a real saxophone as his controller.