Anyone here at CombatAce who is a fan of hard science fiction and space combat might be interested in a sim called "Children of a Dead Earth" by QSwitched Productions a one man developer. The game has been out since September 26th, 2016 and has been receiving regular monthly to bimonthly updates and is is now at Patch 1.1.1. These updates including bug fixes, added features in response to community input, and mod support. I have included the patch notes as of 4/27/2017 in a spoiler box at the bottom.
Weapons include conventional guns, rail guns, coil guns, lasers, and missiles, plus both conventional and nuclear warheads. I think the trailers tell it better than I can in words and note that those trailers are based upon the beta and things have evolved significantly since then.
Link to the Homepage: http://childrenofadeadearth.com/
Link to the Developers Blog: https://childrenofadeadearth.wordpress.com/ Link to the Official Forum: http://childrenofadeadearth.boards.net/ Link to the Steam Store: http://store.steampowered.com/app/476530/Children_of_a_Dead_Earth/