Touhou SouzinengiV -The Genius of Sappheiros-

I've never been impressed by turn-based rpgs, but this one really takes the cake. Incredible depth in its systems, which the game demands you to master in order to succeed. And despite being tough as nails, the game never feels like you have to grind in order to overcome an encounter, even against the insanely difficult final boss. All you need is to consider every option you're given to find the winning strategy.

Solid old-school RPG.

While this game takes a lot of inspiration from Romancing SaGa 3 especially, the core design isn't all that much alike. SaGa games are often considered very difficult, but they're honestly not. SaGa games are all about giving the player a lot of freedom but you can make it through regardless of your choices with overall reasonable strategies. In this game, regular bosses are like superbosses in other JRPGs. Unless overleveled / overprepared, you need very carefully thought out strategies which will take a lot of trial and error or looking up online, and you will want to keep all party members leveled up so you can switch strategies based on the fight. For me, this gets very exhausting. 50 hours of labyrinth like dungeons with practically unavoidable enemies that spam status ailments or big AOEs followed by a boss that requires superboss-level preparations (more so later into the game than earlier). It's basically the same formula for the entire game. The difficulty options don't even matter much, everything I said applies both to Hard and Easy mode. Easy is just a little more lenient. It's just too much for me, I much prefer SaGa games. But if what I described sounds good to you, then it's a quality product