Cyber and robot roar effects like this come from modern digital sound design rather than a single film or character, built by layering synthesised growls, servo noise and electric distortion in audio software. Short clips in this style spread through soundboards, game mods and video editing packs because they are generic enough to fit many machines, aliens and mechs. Editors keep reusing this type of roar for trailers, animations and short form videos where a recognisable futuristic threat is needed instantly without dialogue, music rights issues or a long build up.