numbering is not for order, more to make it easier to organize my thoughts. its hard for me to pick one game in a series...
1) Fallout: New Vegas/ Fallout 3 with new vegas preferred
2) Oblivion/Skyrim - had to put both because each has pros and cons but i came up playing skyrim
3) Arkham City - classic and easily the best in the series. lightning in a bottle.
4)FF7, Remake/Rebirth - self explanatory, more ff7 is always good
5) San Andreas/GTA 4 - giving the slight edge to san andreas due to rpg elements and world expansiveness
6) Persona 3/4/5 - 3 being the foundation and having the best protag imo, 4 for being fun and 5 for being so cool
7) resident evil remake
8) dark souls 3
9) tactics ogre reborn
10) any of the bioshocks but mostly 1 and infinite
damn i have so many 10 isnt enough spaces. i think breaking it down by genre would be easier cuz these are really only games i can think of off the top rn
honorable mention: xcom 2, baldurs gate 3 , divinity original sin 2, red dead series, far cry 5, elden ring, tlou, prey, dishonored, ac 2, origins, odyssey, modern warfare 2, wind waker, breath of the wild series, super mario sunshine, tekken tag tournament/3/4, marvel vs capcom 2, tides of numenera, wasteland 3, ....damn i can go on forever tbh.