Design spaceships then destroy them in Defect SDK
Designing your own spaceships is, of course, supremely cool. Flying that spaceship around, blowing up other spaceships, is even better. And if your crew then defect, seizing your creation for themselves, and you need to build a new ship even better than that old one, oh my, that's best of all. And that's Defect SDK, announced for PC, Mac, iOS and Android.