It is a two player game. The first player uses the Address Book button to eat food, and the second player uses the Memo Pad button to eat food (the two buttons at either ends.) Every time a player presses their button their Russell's weight will increase by one pound (because he's eating very fattening food!) The first player to 300 pounds wins the game. Once a player has won, you are still able to play after the winning message appears (this is so if you want to compete to a higher weight you can do so.)