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.