Command & Conquer Stargate Universe is a MOD developed by a french team on C&C generals: Zero Hour. The final version aims to be a whole new RTS game based on the popular Stargate franchise. The game will provide you with a total of seven playable races (Tau'ri, Goa'uld, Asgards, Réplicators, Ancients, Wraith and Ori), this diversity is due to Stargate world's own diversity (SG-1, Atlantis, Universe and movies). The MOD is designed to be released in three version, each one providing new playable races.
In this 1.5 Alpha version, you will finally be able to play as the Asgard civilization, and serve as a protector of the free people. Now, while it's true that the Asgard are a playable faction, it is worth mentioning that they're not fully complete ingame yet, which means they'll be getting updates in the future. Please refer to the following document to have a look at the full tree tech.