> I've never played one. What is the gameplay?
It's separated into two phases, investigation and courtroom.
Investigation is basically a point and click game, finding evidence, talking to people, etc. Once you have everything you need, you go to court, where you listen carefully to witness testimony, press them for more information, point out contradictions by presenting evidence, etc. It's basically an interactive graphic novel.
The game has such a strong following because of the writing and genuinely likeable characters.