My apologies for making it confusing; I'm not sure how to really word it.
So basically, a version 15.x virtual machine running on 16.x works fine, while a 16.x virtual machine doesn't seem to run games. I'll check more onto this.
I'm using Player, and I'm definitely considering updating to Pro at some point, but right now I'm sparingly using it so I can't really justify it at the moment.
I'm unsure if it had a feature upgrade or not, but it plays games just fine so I'm not sure what's going on.
I guess it could probably be relating to 3D acceleration, but I could be wrong.