After the Iranian Revolution, rock music became illegal. After Iran-Iraq War, the youth needs some music to protest. In the following years, groups such as Kiosk, Ahoora and O-Hum provided important effects in this style. "Jurassic Park Coalition" is the best-known alternative rock Iranian released by Kiosk Group. Alternative rock music is not yet recognized in Iran. And still, the groups that work in this genre continue to operate underground.