Yeah, I played through the Ys series some years ago up to VIII, which was the newest game at the time. I did give up on some of the ones that weren’t good, mainly V.

I’ve tried a few times but it’s usually with older games and there’s something frustrating enough about it that I don’t really want more immediately and need to let it settle. Like I was gonna play all of the God of War games but there are some fights that are just bullshit in the first one, I was gonna play all the Sly Cooper games but there’s some areas with really bad detection for your crook to grab onto, I was going to play all of the Metal Gear Solid games but I think the top down camera angle thing in the first one honestly sucks. I’m probably just picky though.

Yakuza might be a good one, although long.

i did the final fantasy count-up in the lead up to 15 coming out
and i’ve played through the trails series a couple of times (before it got quite so large)

i played through No More Heroes like that last year

Currently playing through the Tomb Raider Reboot series (the 2013 one not the remasters of the old ones)

Only had 3 entries at the time, but I went through the dragon age series before the latest came out. It was pretty fun to watch the evolution of the series. 2 was much better than I remembered at launch, and I think Origins had some serious nostalgia propping up its legacy (it’s still good tho).

Technically I played all Starcraft games 1 and 2 + expansions but that wasnt a planned effort.

Like someone else said, Yakuza would be good for that since 0-6 is pretty much one connected story. I would wait for Kiwami 3 to come out next year though since Yakuza 3 has by far the worst combat in the series.

I kind of did that with the 2D metroid games, but I played remakes instead of the original versions. There’s only 4 of them so it wasn’t that hard