A computer program, residing on a computer readable medium, for a computer system comprising a processor, an input device that receives player control signals, and a display, the computer program comprising instructions for allowing play of a game by causing the processor to perform the following operations:
- cause the display to display a virtual environment;
- cause the display to display a character in the virtual environment, the character including a body and a replaceable head;
- and
- process player control signals that control replacement of the character's replaceable head and other character actions in the virtual environment without replacing the character's body.