Playing Doom 2016 or Doom Eternal is the quickest way for me to get into flow state. My eyes zoom out, I see tiny pixels moving and associate them, react to them, hand and eyes perfectly in sync. My brain basically turns off anything that isn't related to rip and tear. It's such a weird sensation because I know I'm in it because I'm not focusing my eyes on any one thing, it's like I focus to infinity and just sit still and shred.
I sometimes get in the zone a little playing Eternal, it's fun when it clicks but I can't zone in completely.
I'm also currently playing GT7 and if I'm medicated and JUST tired enough I can fall into this intense zone where I feel like a pro, connected to the car and laying down clean and fast laps. It's an amazing feeling but it's so short lived.
Everything bothering me, even physical things just disappear and I'm focused on the game. This is huge for me, due to skin sensitivities every few seconds I'm normally pulled from focus with a slight itch.