What is KSS2?

Kerbal Star Systems 2 is a long-term interstellar expansion project for Kerbal Space Program.

At its core, KSS2 is about pushing KSP beyond its stock limits and turning it into something that feels bigger, stranger and more genuinely exploratory. New stars, new planetary systems, original worlds, more extreme environments, and a stronger sense that you are actually venturing into places that feel distant and worth reaching.

It’s not just about adding more planets for the sake of it. A lot of the work goes into making each world feel distinct, believable and memorable in its own right, both visually and in terms of atmosphere and identity. Some are harsh and alien, some are quieter and more grounded, but the goal is always the same: places that feel like they have character.

KSS2 has been in development for years and has grown into a pretty massive passion project. A lot of that work happens behind the scenes: visual iteration, config work, system design, balancing, testing, reworks, and constantly refining ideas until they actually feel right.

This Patreon exists for the people who want to support that work directly and follow the project a bit more closely. If you’re here, thank you. It genuinely helps keep KSS2 moving.