I'm not a gamer. I've used a bunch of versions of different distros of Linux (been fiddlin' with Linux since 1995) and every desktop version of Windows except 3.0, ME, Vista, and 8. I currently use Mint 17.3 for my dev box(es). If I want Windows, I run 7 in a VirtualBox VM on my Mint box or swipe my sweetie's Win10 box. I haven't tried Win10 in a VM - don't have a license. The box running Win7 on Mint has an Intel i5-3210M (2 cores, 4 threads, 2.5-3.1GHz) and 8GB of RAM...by no means a monster. I give half the physical resources to the Win7 VM when running it, and it feels fine.
I'll never again run Windoze for my desktop. I'll never waste money, buying a new box, when a few years later I can get the same hardware for a fraction of the price. I paid about a seventh of the original price for my fully tricked out Dell Latitude E6430 - USED, about six years old. I don't need bleeding edge performance, since I don't code major systems in compiled languages, play video intensive games (or anything with performance-killing DRM), or mine bitcoin. I'm sure I could double the specs of my current dev-box for half-again to twice the price on EBay, but I simply don't need that much box...you might, if you choose to game on Win10 in a VM.
tl;dr: Stick with Mint. Run Windoze in a VM or keep multiple boxes (I currently have eight).
P.S. Since you're using Mint, you're already using Debian. The Mint team stacks a bunch of non-FOSS on top of Ubuntu after the Ubuntu team stacks stuff on top of Debian. Migrating from Mint to pure Debian simply loses you a whole lot of software and configuration options.