The games use elaborate sets. In one novel an entire island is created for the game; in another, a crater on the moon is domed and heavily developed. Holograms are used for special effects. The blades on sharp weapons can be removed and replaced with holographic edges; this allows participants to engage in safe combat. A combination of computers and gamemasters monitor events, prompt actors playing non-protagonist parts, and resolve simulated actions. Thus, after a player's character has been repeatedly struck with a holographic sword a computer might determine that he has died. The player will be informed that he should pantomime a death and is removed from play.