Borderlands is a collection of Star Trek-based play-by-email roleplaying groups, home to eight RPGs known as "duty stations", both new and long-standing, with a collective setting in the Delta Quadrant, some thirty years after the USS Voyager returned to Earth. In Borderlands, participants may play as members of Starfleet, join the Romulan or Klingon Empires, serve aboard a civilian merchant ship, or unite with a rebel faction against the Federation. Crew-members play as part of a team in a wide range of missions, from science to exploration to full-scale battles.