Black & White is a god video game. The player acts as a god whose goal is to defeat Nemesis, another god who wants to take over the world. A primary theme is the concept of good and evil, with the atmosphere being affected by the player's moral choices. The core gameplay mechanic of Black & White is the interaction between the player and an avatar creature, who carries out the player's instructions and whose personality and behaviour change in reaction to how they are treated. Multiplayer is supported over a local network or online.