Clash Royale is a mobile strategy game developed by Supercell and released worldwide in 2016, combining card collecting with real-time tower battles. Its bright, cartoon-style presentation helped it become one of the most recognisable mobile games of its era, with millions of players sharing matches, deck guides and reaction videos online. The short intro became a familiar audio cue for that content, signalling a Clash Royale video within seconds. It remains popular with creators because it is instantly recognisable, even to viewers who have not played the game in years.