Forerunners (Earth-2003)

"I mean did they really need to spend all their time building stuff to destroy the universe? Like, how about the galaxy’s biggest movie theater or, like some kind of super advanced water park? All work and no play guys, seriously."

- Grif The Forerunners were a highly-advanced alien race whose empire encompassed three million fertile worlds in the Milky Way galaxy approximately 100,000 years ago. They were the creators and builders of many significant installations, including the Halo Array, the Ark, and the Shield Worlds, as well as numerous lesser artifacts later found on many worlds.