every single Persona game, basically impossible to do everything in a single run in persona 3,4,5
even a perfect run (100% social links, all persona, and missing nothing) you still have things you literally had no time for cause of the calender time limit those games have. i actually have a lot of fun hitting all the 'negative' dialog choices on NG+ because i can easily make those points up
Metaphor Refantazio (which I cleared 3 times back to back, hard mode, regicide mode, and a third on "storyteller" mode for the fun of it) basically close to being a Persona game, just much MUCH better than any of the persona games, absolutely a fun time. and this game you can do just about everything in one playthrough (except the newgame plus only superboss)
Trials of mana has like 3 different final bosses and 6 main characters, which you pick 3, and they sort of interact with each other (i played this game about 8 times and kept seeing new dialog lines)
throw in a lot of class choices and it's incredibly replayable
even the original SNES game (seiken densetsu 3) was incredibly replayable, and actually longer (and harder) than the full 3d remake was
almost every single namco Tales of game has new game plus stuff and features that unlock only in new game plus. i've played almost all the mainline ones twice in a row, some more than twice.
practically all the YS games that have a new game plus, YS 8 is basically my all-time favorite game ever, and NO GAME has come even CLOSE to that for me, it's absolutely a masterpiece of a game and i've played it a bit too many times.
all the Cat Quest games, are stupidly replayable, especially 2 and 3.
Cat quest 2 i've replayed like 20 times, the game goes to "new game +9" in other words the game scales up each new game plus with higher level enemies (and loot) nine times (at which point every enemy is near level 900+) and then the "Mew game" modes which is throwing modifiers into a run like magic only, no armor, 9 lives mode, turbo mode (x2 game speed), level 1 only, etc.
Cat quest 3 is just about the same with new game plus+9 and Modifier stuff.
CQ2 and CQ3 are local 2 player co-op also, pretty fun!
i've spent 100 hours on both 2 and 3 myself.
more recently, i can't tell you how much time i spent on Vampire survivors
jeez... they keep adding more to it!
they added among us dlc map, they added a contra dlc pack,
they added a castlevania dlc pack thats SO MASSIVE, it practically doubled the game size! and they JUST ADDED MORE CASTLEVANIA IN A RECENT UPDATE FOR FREE
and then they got free DLC with a Balatro map, and SaGa emerald beyond map.
on PS5 the game says i played 140 hours, on Steam it says 70 hours, i've also played it on mobile, and had it on my ps4 prior to that (no clue since it didnt show playtime)
and they also ADDED ONLINE CO-OP finally! and it's pure chaos.