 Open ended games do not end and players can develop their positions to the fullest extent possible, whereas in closed end games, players typically pursue a set of victory conditions until game conclusion.Finally, PBM games enable players to explore a diverse array of roles, from characters in fantasy or medieval settings, space operas, inner city gangs, or even more unusual ones such as assuming the role of microorganisms or monsters.The earliest play-by-mail games developed as a way for geographically separated gamers to compete with each other using postal mail.