SWN Rules Explained: How to Build a Sector in Stars Without Number
12m | Sep 17, 2026This rules breakdown was released two weeks early for patrons. To skip the wait on every episode, Star Master Log, and rules breakdown, join us at https://www.patreon.com/DarkStarAdventurecast
This episode of SWN Rules Explained looks at how to build a sector in Stars Without Number, the map of star systems where a campaign takes place. Brian walks through the setup from the revised rulebook: an 8-by-10 hex grid, a d8 and a d10 to place 20 to 30 stars, and the three-hex limit that keeps systems close enough for ships to reach. From there he covers world tags and the enemies, friends, complications, things, and places each one points to, plus the short list of questions that turns a planet from a dot on the map into somewhere the players actually want to go. He frames it against the crew's arrival at Prometheon Station in Episode 31, "You're Arriving Very Late," the far end of a sector map the Star Master drew up well before the campaign started.
New SWN Rules Explained episodes drop every other Thursday, breaking down the mechanics behind the adventure.
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