Destiny… not Stargate Universe, but Bungie’s Halo replacement.
There are big games and then there are BIG computer games… and the Halo replacement game from Bungie is certainly one such beast. It’s called Destiny and here’s the first trailer for the game. This one is about the last city on Earth, after humanity has had its ass handed to it by an alien species. The last city is protected by knights given high tech by a mysterious alien guardian called only the Traveller, whose large moon-like sphere still sits above the planet, protecting us from alien invasion, kind of.
Echoes of Nemesis the Warlock here, along with some of Greg Bear’s early scifi novels.