A childhood favorite, played it for hours as a kid. Sure, it's a shorter title as far as Playstation RPGs go, but it's a magical time. The fusion system is probably why I spent so much time on it, and is the highlight. Tameable monsters (called "minions") actually have their model and animations altered depending on what other monster you fuse with them - you can even re-fuse the hybrids with other hybrids! There's a touching story about love, duty and sacrifice. The unique tribal setting and music are incredibly memorable. The art direction of the game being headed by Studio Ghibli alum Katsuya Kondō make it a beautiful experience. It's well worth preserving for future generations just because of how truly unique a monster-battler it is.