This is my 50th post on this blog, so here's a brief introduction to tech in my DCC sword & planet setting, Phantasmagoria:
Technology in the galaxy is rare, but not non-existent. While most foes you'll encounter will be wielding a flintlock pistol, or a sword, you will occasionally find people wielding nuclear-powered firearms or with personal force fields. The technology that you find is the remnants of a long-dead, highly advanced civilization of which very little is known, save that the civilization broke down long ago. This highly advanced empire is the basis for a lot of the space-ships found in the setting as well. The Foundation series is a great basis for what the empire was like, except there was no Seldon to save civilization from the collapse.