I don’t know if I could call it good, exactly, but one unique concept that I haven’t really seen captured anywhere else was the Dungeon Maker series on PSP, that allowed you to build dungeons that you would then explore/fight/loot, to give yourself funds to build out further/deeper, ad infinitum. It was clunky, controlled pretty stiffly and basic as ARPGs go, and after a certain point you kind of went on autopilot, but there’s a certain je ne sais quoi to it that I really quite enjoyed, especially if you planned out your builds. I think a similar title was released on the DS but it was turn-based and not particularly well-executed.