Mah-Jong 300 is a new game for the Nintendo DS. It is a 2D action-RPG game with a learning curve to be used. You are a player of Mah-Jong 300, however, your only goal is to achieve the maximum score. The game is divided into four parts: first person, third person, or all-in-one (A.I.), and all-in-one. In part 1, you are the only player in a 3D environment. You must use your skills to defeat enemies and reach the final goal. In part 2, you are in the 3D environment with a limited number of players. In part 3, you are in the 3D environment with many players. In part 4, you are in the all-in-one environment with many players.