: KSP has previously been featured as a free title on platforms like the Epic Games Store
There is an official, free demo of Kerbal Space Program available. While it is based on an older version of the game (lacking many modern parts and planets), it provides the core gameplay loop for free. This is the only legitimate "KSP download free" option.
No safe, legal free download of KSP 1.1.2 exists for non-owners. Avoid sketchy "free download" sites — they're full of malware, fake installers, and outdated/corrupt files.
If you already own KSP on Steam but are on an older version, here is how to get 1.12: Open your . Right-click on Kerbal Space Program . Select Properties , then go to the Betas tab.