AUTOMATIC MOVEMENT OF PLAYER CHARACTER IN NETWORK GAME

A game includes player characters in a virtual space. The game is progressed in accordance with game progress information, which is useable for generating a game screen. The game screen is configured to be displayed on a display device. An instruction for registering a player character, which is manipulated in the game by a first player, is received, and the player character of the first player is registered as a copy non-player character. The copy non-player character is configured to be manipulated in the game by a second player. The game progress information is updated, and data of the player character of the first player is updated in accordance with a manipulation of the copy non-player character by the second player during a period in which the first player is in an off-line state.