Clash Royale launched in 2016 as a free-to-play mobile strategy game from Supercell, mixing card collecting with real-time tower battles. Its bold opening music quickly became familiar to millions of players who heard it every time they started a match. As gameplay clips, reaction videos and short-form edits spread online, creators lifted the intro to signal a clash was coming, and louder, punchier versions became popular for edits that needed to cut through other audio. It remains in use because the sound is short, recognisable and instantly sets a competitive tone.