If you want to play Kerbal Space Program safely and support the developers, you should use official storefronts: Often features deep discounts during seasonal sales.
You can buy a DRM-free version directly from Private Division . Kerbal Space Program Free Download (v1.12.3.031...
These sites often redirect you through multiple ad-heavy pages designed to trick you into downloading browser extensions or unwanted software. If you want to play Kerbal Space Program