TribeNet is an open-ended, medieval fantasy, play-by-email (PBEM) game. It was first published in the mid-1980s in Australia as a hand-moderated play-by-mail (PBM) game. After multiple gamemaster changes in the 1990s, Peter Rzechorzek took over as gamemaster in 1997, at which point the game transitioned from postal mail to email. Since its inception, the game expanded from the initial continent available for gameplay, adding additional continents such as Cyberia and Pelagoria.