Welcome to the Infinite Void. This isn't the outer space of our physics-bound modern world, but a magical space, loosely based on early modern ideas of the aether and crystal spheres, where gravity is always Earth-normal (until it's suddenly not there at all) and everyone carries their own atmosphere with them when they take off into the void.
While inspired by the 1989 boxed set Spelljammer: AD&D in Space from TSR, it's designed to work with either Melsonian Arts Council's Troika! Numinous Edition or R. Rook Studios' Enoch's Wake.
36 ready-to-play character backgrounds for your fantastical space campaign.
This is not a standalone game. Grab a copy of Enoch's Wake here.