), is an action-adventure platform game released by Vic Tokai for the Nintendo Entertainment System on January 27, 1989 in Japan and December 1989 in North America.

He later gains the ability to perform various powers by collecting Force, including shrinking, teleportation to previously-visited areas, flight, healing, and invincibility.

[6] He is contacted during a vacation at the beach with his girlfriend Mary to save Professor Plum, creator of a Doomsday Bomb capable of destroying the world.

[7] Bang soon encounters Tom Guycot, the skeleton mastermind behind the abduction, and he learns that the Doomsday Bomb is controlled by six medallions which have been distributed among the seven governors of Demonhead.

Bang later discovers that the discomfort is a failed attempt at mind control by a demon trapped beneath the mountain at Demonhead's northern end.

[9] Upon defeating the demon and recovering Guycot's medallion, Bang attempts to rescue Professor Plum, but learns that the Doomsday Bomb is already complete.

Other changes brought to the American version include a different titlescreen, the removal of some dialogues in the game and the adding of a mustache to the shopkeeper.

The creator of the comic book, Bryan Lee O'Malley, reportedly told that Clash at Demonhead was the first NES title he ever played.