Easy. Linux Mint with VirtualBox. Test your game first under VirtualBox. As long as you enable the CPU virtualization features and Open GL plays nice there is virtually no performance hit. Mint is very Windowsy. You won’t have a big learning curve.
You wont care if you get Windows 7 hacked/infected. Every VM technology has its version of snapshotting...VirtualBox included. It’s easy to manage snapshots in VirtualBox—you can take snapshots of a running VM or a VM in a saved or even off state. Once you create a snapshot, you can restore a previous snapshot, delete a snapshot, and view details of a snapshot.
Linux is great. Seriously.
i use mint as my main os- an dual boot into windows for windows only games and for using photoshop-