Clash at Demonhead, known in Japan as Dengeki Big Bang! (Japanese: 電撃ビッグバン!, Hepburn: Dengeki Biggu Ban!, Blitz Big Bang!), is an action-adventure platformer video game released by Vic Tokai for the Nintendo Entertainment System on January 27, 1989 in Japan and January 1990 in North America. The North American cover was illustrated by Lawrence Fletcher.