Publisher's blurb:
Build Cultures for Humanity and Aliens in Ironsworn: Starforged!
With humanity spread across the Forge, new and diverse cultures can be found in every new sector you explore. This supplement will help you design those cultures using six dimensions found in real academic research as well as government type, societal flaws, and traditions.
On top of that, you can now create your own alien civilizations! Build your own alien cultures from the ground up with xenobiology and xenoanthropology. Or, build a quick alien NPC with a single roll of your challenge and action dice.
Using Cultures for Other RPGs
First of all, if you're not playing Shawn Tomkin's Ironsworn: Starforged game, what are you waiting for?! It's a great game that has all the drivers you need to make excellent sci-fi stories with just the right amount of grit. The digital version is available here on DriveThruRPG, or you can find the physical version on other websites.
As great as Starforged is, you could also use the ideas about building culture provided here for world-building in almost any other gritty, sci-fi system or setting. There are no mechanics presented in this supplement, so it should be easy to use anywhere in any game.