This is the 4th video of Kerbal Space Program. I've played this game for around 2 years now so i know alot about it. That don't mean i make mistakes non-stop because I don't think some things out..lol. There is a demo for the game on their website which has all the basic parts in it. I'm not sure if all the planets are in it or not. It's worth trying out because even if you crash and burn it's still fun.