I messed up a bit. Kosmic is their brand of Cepheus, basically the rules. The setting is called Solis people of the Sun.

This is the blurb:

This Book contains accurate star maps to 15 parsecs around the Earth. With 30 star maps detailing 521 star systems, plus 31 planetary maps, and expanded star systems.

This is us, the Sideralis, and Solis People of the Sol system, Humans. The date 2271, and it is a new day with new people, the future is unwritten. […]

Traveller is half the galaxy, millennia into the future. Solis is a couple hundred years from now, and a much smaller chunk of the galaxy. It’s a different vibe.

Hostile is the retro-future, like the Alien films, Outland, etc.