BTW, unity does offer a full source of the engine to companies that are willing to pay enough for it. So you can effectively modify it as much as unreal. Altho

BTW, unity does offer a full source of the engine to companies that are willing to pay enough for it. So you can effectively modify it as much as unreal. Although, I don't even know if the KSP2 studio is big enough to afford it, let alone if they are actually doing it