Age of Empires II, first released in 1999, built its atmosphere partly from short, characterful unit voices that players hear hundreds of times during a match. Clips like this oooh became familiar outside the game as players recorded and shared their favourite lines on soundboards, forums, and video edits. The sound survives because it is instantly readable: a single human reaction with no context needed, whether the moment is genuine admiration, comic shock, or sarcastic disbelief. Its brevity also helps, since it can punctuate a joke without interrupting the action around it.