Battlefleet Gothic

Battlefleet Gothic is a space combat game that started in 1999 made by Games Workshop with its run ending in 2013. Since then, its gained a bit of a cult following. 

Set roughly 38,000 years into the future, the game follows the galaxy post Horus Heresy where the Imperium of Man is in decline with the forces of chaos, necrons, orks and more all out of their own agendas.