The best way is to approach and ask for an autograph in person. I doubt that such people read all this themselves and respond. I think each of them has either a special person or even a whole crew for this. Yes! It all depends on how famous the person is! I think sometimes it's a whole job for mana...

I can't name just one game because it wouldn't be fair! On my PC, I play Red Dead Redemption 2 and all the GTA series. But when I use my laptop, I prefer playing online games.

Who would you most like to get an autograph from?

All these certificates can be easily forged, just like the signature itself. I would be cautious with this.