Forerunner

The Forerunners (Latin Primoris prognatus, meaning "Firstborn") were an ancient species of extremely technologically advanced beings whose empire—known as the ecumene—encompassed three million fertile worlds in the Milky Way Galaxy. The Forerunners reigned for millennia as the ascendant civilization in the galaxy until the activation of the Halo Array, their Pyrrhic solution to halt the Flood, in 97,445 BCE. Although they themselves are essentially extinct, evidence of their existence remained, spread across the galaxy in the form of numerous creations, installations and artifacts.

In modern history, the alien hegemony known as the Covenant mythologized the Forerunners and revered them as gods, deriving much of their own technology from Forerunner artifacts found throughout the galaxy, and held that any who defaced these relics were heretics.

Forerunner Installations & Artifacts

 * Installation 02
 * Sword In The Stone
 * Microlith
 * The Barrow (Had possession of various Forerunner technology)
 * Various Forerunner ruins and artifacts were occasionally found across Trost.
 * Loki itself was a Forerunner installation, featuring a Dyson Sphere in its core.
 * Brink Installation
 * Bellaphron had various Forerunner artifacts and technology.
 * Various Forerunner ruins on Delta Forti II.
 * An underwater facility was on Dolorosa.