Recent reviews by Ghosty Starfire

I bought KSP before it was even on Steam, and every update has been great.

Especially the latest one, which added communications networks.
It makes launching fleets of satellites in career mode actually worthwhile beyond arbitrary money and science rewards.
RemoteTech has been my number 1 mod for years and it's great to have similar functionality in the base game.

The best puzzle game I've played in a long time.

May not be for everyone though, you have to invent your own solutions - it helps to have a background in programming or design work.