: These allowed for horizontal construction and takeoff, introducing spaceplanes and traditional aircraft to the Kerbal universe.

Troubleshoot on modern operating systems.

Before the massive planets, the colonies, and the mind-boggling astrophysics of today’s full release, there was the version that changed everything . For many veteran players, isn't just a patch note; it is where the dream of "Kerbal" truly lifted off the launchpad.

Finding a clean, virus-free version of a 14-year-old alpha build is tricky. Here are the three safest methods as of 2026.

Did we help you find the file? Leave a comment below with your best 0.15 "Kraken attack" story.