AT-43
Prior to Rackham having their site shut down, they had a pretty badass tabletop miniature game called AT-43. The setting basically detailed the misadventures of a number of different factions kicking the crap out of one another in order to become the dominant one. The games were smaller-scale and ran a bit smoother than Warhammer 40K because the miniatures had handy stat-cards available. The general gist of the factions were as follows: