Hello noface60,
Welcome to the
ColorDirector forum
The would be no such thing, I think, as the "best" preset for adjusting all game footage. There's such a huge variety of graphic & design styles, ranging from cartoonish to life-like.
For example, if you applied the same colour adjustment to Assassin's Creed & Super Mario, you'd get very unsatisfying results.
My view would be that, beyond some basic sharpening & clarity adjustment, you'd need to make presets appropriate to the graphics in a particular game.
Another thing to consider is that during many games light & colours vary significantly, so applying a preset universally may not work too well.
It very much depends on the game/s you're referring to.
PIX
PIX YouTube channel