The sound comes from They Are Billions, a post-apocalyptic real-time strategy game by Numantian Games that entered early access in 2017 and fully released in 2019. Players build colonies and defend them against huge zombie hordes, so human survival is the central theme. Short unit barks and battle cries like this one became easy to lift for edits because they sum up that fight in one line. Online, gamers reuse the shout outside the game for any outnumbered stand, comeback attempt, or tongue-in-cheek charge into danger.