Nintendo DS Spirits Vol. 4 - Reversi (Japan) (ニンテンドーDS スピリッツ Vol.4 リバーシ) is a classic game of strategy and skill for the Nintendo DS. Players take turns placing pieces on the board, with the goal of having the most pieces of their color at the end of the game. Reversi is simple to learn yet difficult to master, as players must think several moves ahead in order to outwit their opponent. The game features four different levels of difficulty, as well as a tutorial mode to teach the basics of the game. The game also includes a two-player versus mode, allowing players to challenge their friends. With its classic gameplay and intuitive controls, Nintendo DS Spirits Vol. 4 - Reversi is a great way to enjoy a classic game on the go.