User blog comment:James12708/Reapers VS. Forerunners VS. Angels from Darksiders VS. Humanity from Halo VS. Council and humanity from Mass Effect VS. Imperium of Man/@comment-4118072-20121114213733/@comment-4237253-20121115030248

I was going to ask too, but then I Googled. I found out the answer in under 10 seconds, after approx. 4-5 mouse clicks.