The sound comes from Counter-Strike, where the USP has been the Counter-Terrorists' default silenced pistol since the early versions of the game. Its quiet shot became instantly recognisable alongside voice lines like enemy spotted and announcements such as bomb has been planted. As frag movies and later short-form gaming clips spread online, players ripped individual weapon sounds for edits and soundboards. The USP fire remains popular because it is distinct without being overwhelming, signalling a skilled pistol round rather than heavy automatic fire in shooters.