Oh hey, this is a blast from the past. Thanks to everyone for contributing to this thread!

Will edit later with actual numbers but it should be something like Super Mario, Metroid, Zelda, Mega Man, Tekken, Resident Evil, Final Fantasy

Probably Super Robot Wars series.

There are so many series i played from the beginning to this day
Tekken comes to my mind or resident evil

1. Pokémon - 10 games
1. Mario - also 10 games
3. The Legend of Zelda- 7 games

Final Fantasy: 32
FF1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10-2, 11, 12, 13, 13-2, 13-3, 14, 15
Crisis Core, Crystal Chronicles, Dissidia, Type 0, FF12 Revenant Wings, Tactics, Tactics Adv, FF Legend, Theatrhyhmn, Curtain Call, mobious, record keeper, dimensions, My Life as a King,

I think that's it.

Oh my, if I counted like that, I'd easily be over 50!

I think it's Sonic.

Sonic 1, 2 (GG), Sonic chaos, sonic 1, 2, 3, knucles, CD, Adventure 1, 2, heroes, shadow, 06, generations, lost world.

15

That's owned btw. If it's played ever, it would be even more, adding the advance and rush sub series, spinball, triple trouble, fighters, chronicle, unleashed... theres probably more.

Sonic brought me into gaming, so it's fitting. But, Sonic has been trash for a very long time. I hate everything post 06 on rails. Lost world was a bit better but i didn't enjoy how they copied galaxy.

Honestly... if SEGA kept taking hints from their community and made a 3D Sonic game like Sonic Utopia and kept the 2D series going in parallel, Sonic would be great again. Unfortunely they are still trying to resort to cheap tricks to get atention and i don't think Sonic forces is the way forward. Sonic mania though, is a great gust of fresh air.

Counting only mainline titles? I have played all 7 Mario games (SMB1, 2, 3, World, 64, SMG1, and SMG2), every Zelda (Zelda 1, 2, LTTP, OoT, MM, TP, Celda WW, SWS, and BotW), all three Metroids (1, 2, SM, I don't think the FPS or later handheld ones should count as mainline), and 12 of the 15 Final Fantasy, although 11 and 14 don't really count, they're the freak FF games, so it's more like 12 of 13. Two Pokiman game (not sure which ones, they were on 3DS and were pretty much the same game with different names of people and towns) and Pokiman Go, I played Street Fighter 2 only... like 6 different versions. I think I played 3 Megaman games like 30 years ago. All of the main Castlevania games (I don't count the crappy handheld or even crappier 3D ones, just 1, Simon's Quest, Dracula's Curse, Super Castlevania, Rondo of Blood, and Symphony of the Night).

So Final Fantasy, of the ones listed. There's many more of them than other franchises.