Fecha de publicación: 23/10/2001 Fuente: WIPO "royal booby" A computer program displays a virtual environment and a character in the virtual environment. The character includes a body and a replaceable head. Player control signals from an input device control replacement of the character's replaceable head and other character actions in the virtual environment. The computer program may attribute play characteristics to the character based on the head in place on the character at a given time. These characteristics may be thematically consistent with the displayed appearance of the head in place. The program may allow a player to select a set of character heads for use with the character. The program may allow the player to collect heads from the virtual environment and store the collected heads for use. The program may offer communication with other connected computer systems facilitating a multi-player or on-line interact hosted game.