Return to Morroc is an extensively customized Ragnarok Online experience, closer to a remake of the entire game with all new classes and regular content updates. PRM isn't afraid to break the mold and try new things, and borrows from more modern MMOs for things like mechanics-driven combat. Content is carefully thought out and feels like it fits as part of the world instead of just being slapped on. Class balance is surprisingly solid given that the game has 30+ classes made form scratch.