Radical Dreamers is super underrated and genuinely fun to play if you enjoy the stylistic tone it sets. Pound for pound, I think I actually like Radical Dreamers more than Chrono Cross. And I 100% agree with Kodokami: Play it at night, when it's peaceful and quiet.
The game has different scenarios. The first time you play, you'll always get the same one, but if you play it again afterward you'll get something completely different (albeit in the same setting with the same characters).