Hadouken originates from Capcom's Street Fighter series, debuting in the original 1987 arcade game as a special move for Ryu and Ken. The attack channels energy into a blue fireball while the fighter shouts its name, a convention borrowed from martial arts anime. It became one of gaming's most quoted moves through Street Fighter II in the 1990s, spreading into parodies, cartoons and internet memes where the shout alone signals a devastating, exaggerated attack.