The title points to Black Squad, a tactical first-person shooter in which players move through industrial maps where boots on metal floors are a familiar part of the soundscape. Footstep audio matters in this kind of game because it tells players how close an opponent may be, which makes a clean metallic version useful outside the game too. Online, creators reuse short game footsteps for montages, memes and edits where a character is creeping, patrolling or about to be caught, much like an enemy spotted callout. Its short, looping rhythm keeps it useful for suspense scenes.