This series has recently been ported to PS4, Xbox One and PC. I never owned a DS but the concept of this game (being a lawyer) was always interesting to me. So I took a chance and currently I'm really enjoying playing through it.
The format is episodes with manual saving so you can play in short chunks. It's mostly a puzzle game with some exploration built in. The story is well crafted and clever imo. I strongly recommend you play without a guide to get the best experience.