AT-43
Prior to Rackham Games 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:
The Races
The UNA The United Nations of Ava is basically stereotypical space soldiers with guns. They kick ass and that's about it.
Red Blok Human Space Communists with awesome power. Intent on kicking every other faction's ass in order to provide glorious communism to the entire galaxy and ensure humanity's survival.
Therians Killer cyborgs with skeletal, cybernetic troops. They're nasty pieces of work and you are cruising for a beatdown if you let them get close. Also know for Trolling the Universe.
Karmans Motherfucking Space Gorillas. We're dead serious. This game is instantaneously awesome because Everything's Better With Monkeys.
The Cogs Killer space robots that pack temporal weapons that will fuck your shit up by teleporting you into space.
The ONI A big corporation that has Mercenaries, Zombies, and Mercenary Zombies. In Space.
Inevitable Really
AT-43 miniatures are high-quality and slightly more reasonably priced compared to that of a certain other developer, and come pre-assembled and painted, along with tons of accessories and a terrain piece. This inevitably led to a number of fa/tg/uys to begin modding them to serve as miniatures in other games (most notably Warhammer 40K). Much lulz resulted, especially when using humorous examples (such as modding UNA Walkers to use as Gue'vesa vehicles, as this asshole did).
Damn It
Sadly Rackham's site's been down since getting DDOS'd back in December. :(