In the dark, distant future, when the universe has suffered heat death, all that will remain will be Arcen Games, stubbornly releasing new patches for their epic space startegy, AI War. The next patch is due tomorrow, it's called 6.0, and as I understand the patch coincides with a new expansion: Ancient Shadows. That's been available in beta for a bit, I think, but tomorrow should the full roll-out. They've been expanding and patching this beast constantly since 2009 and they show no signs of stopping. Needless to say, the expansion has tonnes of new features, including: "A whole new kind of human player. It's possible to control champions alongside your main fleet, or to have a friend or family member control just one single massive ship."
Trailer below. (And there's sixty-five thousand words worth of release notes here.)