DIRECT LINK: childrenofadeadearth.com/
Children of a Dead Earth is the newest game with a catchy title in the genre of space combat simulator, with an extra heavy emphasis on the "simulator" aspect of the genre. It was designed to incorporate all of our modern, proven technologies and explore how space combat might look if we were engaged in it today.
The gameplay has a campaign and a sandbox. The campaign consists of several challenges that progress a story. The sandbox is basically a free mode that allows you to create battles to test ships. The real meat and potatoes of the game is the ship and module designers. The ship designer allows you to create and design ships from base modules, arranging components and weapons, and deciding on armor. The module designer is like a series of miniature simulators, which allow you to design ship components. Need a new engine? Design one, and see if you can get what you need. All of the values and numbers are pulled from equations actual engineers use when designing these components. All of this adds up to a simulation that is very strict but rewards lateral thinking and good designs.
If you are interested in the game, direct link is here: childrenofadeadearth.com/
If you like what you hear and want to see how the creator, Zane Mankowski, thinks about his project, see his blog: https://childrenofadeadearth.wordpress.com/
If you are a huge nerd, his blog is fascinating.