Rhapso is a blockchain-based fishing adventure game where players can explore, catch, and trade in a vibrant underwater world. It features Raft and Fishing Rod NFTs, which are central to the gameplay. Players can customize their rafts and choose from various fishing rods, each with unique abilities. The game incorporates strategy and chance, and players can upgrade their gear with RPT tokens. Rewards from fishing expeditions include unique NFTs like fish, gold, and seaweed.