Mizzurna Falls is a proto-Shenmue masterpiece on PS1, with an open explorable world and a day/night cycle framing the story progression. It's inevitably gonna feel smaller in scope than Shenmue 2 (anything will), but mostly from having no minigames or collectibles as extra padding. The core gameplay is solving a murder mystery by gathering information, exploring, experimenting. Everyone once in a while you'll be surprised by a chase sequence, fight, stealth, navigating an area in the dark, and many other little changes in gameplay to keep you interested. Oh, you also have a car.

It's not for the faint of heart, but since you enjoy Shenmue I'm gonna assume you're ready for a slow-burn adventure game like this. Many people will tell you it's impossible to hit all the time-specific events and get a good ending without a guide, but if you reload saves anytime you seem to hit a dead end it's actually very doable. The game will breadcrumb you to the very end if you pay attention and/or take notes.