Epic has given away the base Kerbal Space Program for free multiple times. Occasionally, during "Mega Sales," they offer the History & Science Pack DLC as a separate free add-on. Add it to your wishlist and wait for the Thursday drops.
Heard the latest? The "Making History" expansion for Kerbal Space Program isn't just about building rockets; it’s about rewriting the space race. But if you don’t want to pay full price for the DLC, here is the official breakdown on where you can grab it for legally. Kerbal Space Program Making History Free Download
If you navigate to the Kerbal Space Program folder on your hard drive (or SteamDB), the "Making History" mission files are actually included in the base game patch 1.4+. You just can't build the "Saturn V" parts without the license. However, you can play user-created missions from the Workshop for free without owning the DLC. Epic has given away the base Kerbal Space
If you see a website offering a direct ".exe" for "Making History Free Download," run away. KSP mods are open source, but the DLC is proprietary code. Those sites usually contain malware designed to mine crypto or steal Steam logins. Heard the latest
While not strictly "free," keep an eye on Steam Family Sharing . If a friend owns the Making History expansion, and you join their Steam Family, you can download and play it as if it were yours for free.