Dreadnought
Deity
Say, a Homeworld kind of game could be interesting, don't you think so?
Have all your people live in an artificial planet that you can move, and use that as your base. Planets you encounter on your way would be traded with for resources or just ransacked if you feel like it or there isn't anything living there. You can take the remains from battles and convert those to new resources or study the ships for new things... Endless possibilities, easier to make than my old idea.
Opinions?
As in the video game? That might be fun, yes!