https://halo.fandom.com/wiki/Prehistoric_human_civilization

Halo 4 introduced the idea that 150,000 years ago, prehistoric man was comprised completely of hyperintelligent Kangz flying around on intergalactic spaceships forming a vast interstellar empire.

https://halo.fandom.com/wiki/Forerunner-Precursor_war

I guess this is from a book or something, I never read it I only stumbled across this, but yes, the Flood is basically the dandruff of Space Cthulhus.

Games.

https://halo.fandom.com/wiki/Prehistoric_human_civilization

Yes that's how gay Halo got. 150,000 years ago humanity was an intergalactic space-faring empire, comprised completely of black men.