Hi! I’ve been working on a list of RPGs (mostly japanese or j-influenced somewhat) in which the cast is mostly adults. The list is hosted on backloggd.
Leaving it here both in case it may be useful to anyone, but also in case you spot any missing titles that you believe should be added :) cheers!
P.S: the only reason for not taking western RPGs into consideration is because… well, most of them already feature adult casts. Think series such as Divinity, Shadowrun, Baldur’s Gate, etc. However, those usually play dramatically different when compared to the JRPG-style turn-based combat.
Parasite Eve and Persona 2: EP were always a bit striking to me in this regard especially because they are in modern-day settings. Also, they both don’t have a young child joining the party at any point, which is a thing in a lot of the games in this list.
Parasite Eve truly is an experiment worthy to be the father of a subgenre, although it never happened. Maybe things could have been different if the story was a little more interesting and captivating :(