There is an old PC game I'm trying to remember the name of, but I can't for the life of me.
It was a Worms style game set in space on planets of various sizes. You had a ship with a variety of weapons and moving abilities, and you were trying to blow each other up. You could terraform and create copies of planets, you could launch yourself from your current resting point (and I think gravity from the planets affected you and your weapons). It was a lot of fun, and while I'm sure there isn't a good way to play it, it would be fun to reminisce.
Help me Obi-Wan PA Forums; you're my only hope.