PC game slow when launched from retrobat

I have a Pc game that run just fine when I launch it directly through windows, but when I try to launch it from retrobat, it does launch, but it is pretty slow, just like it my computer was struggling, but I know it runs just fine on the same PC when launched directly.

Any idea?

I find pc games behave differently from game to game. Try running through steam. I have big picture mode load from within retrobat and then run from there.

how exactly do you launch big picture mode steam from within retrobat?

I'm trying to achieve a mouse and keyboard less arcade cabinet and would really like to be able to launch a couple PC games from retrobat with only my arcade controls, but so far, no luck, when a game starts, it's either slow or windowed or some other problem happens