Medieval Engineers is made by Keen; the makers of Space Engineers. I have 1,800 hours in Space Engineers, and let me tell you, most of the people who play SE do it only because it's the only real name in the "space vehicle designing" genre. We're all waiting eagerly for some other game to come and de-throne SE. Keen aren't exactly the worst dev out there but they're not great either. They had one big hit six years ago and they refuse to give us a sequel.