Battlefleet Gothic: Armada 2

[Mark-x]

   Battlefleet Gothic: Armada 2's cosmic battles are spectacular. There's a trio of vaguely 4X-y campaigns following the three of the Warhammer 40K factions: The Imperium, Necron Empire and the nasty Tyranid Hives, but you can ignore them if you want and just dive into some messy skirmishes full of spiky space cathedrals colliding with giant, tentacle-covered leviathans. 

The real-time tactical combat manages to be thrilling even when you're commanding the most sluggish of armadas. You need to manage a whole fleet while broadside attacks pound your hulls, enemies start boarding and your own crews turn mutinous. And with all the tabletop factions present, you can experiment with countless fleet configurations and play with all sorts of weird weapons.