(Opinion) Nimbatus - The Space Drone Constructor
Nimbatus is a game that was developed by Stray Fawn Studio and its an action-packed single player simulation game, you can create your own drones from hundreds of parts.
Explore the galaxy which are generated and also the planet can be destroyed by the weapons of the drones. You can build autonomous drones that can fight other player's creations and become the best drone engineer.
The Nimbatus, are exactly the biggest mobile drone factory that was sent out to the space, the mission it had is simple which is to gather as much information as possible about the universe and find the far end.
But beware that its not going to be an easy ride, the many unwelcome encounters is hindering the mission, and being far away from home, isn't exactly nice, so take the task to discovering, and population control also environmental disasters will not be easy at all.
More about the game or information of it here, Nimbatus - The Space Drone Constructor.