The sound comes from StarCraft, Blizzard's 1998 real-time strategy game, where Terran structures trigger a base under attack warning during combat. Short alerts like this became shared gaming shorthand online, alongside lines where an enemy spotted moment or a bomb has been planted changes the pace of a match. Players clipped the warning for streams, machinima and meme edits because it needs no explanation, anyone familiar with strategy games understands incoming damage, a threatened base and the scramble to respond before it is too late.