Dynamite Headdy is a video game released in 1994 by Sega and produced by Treasure Co. Ltd. It was released on the Sega Game Gear and Sega Mega Drive system.

The style of the game is platform/action. In this game player slip into the role of mascot character Dynamite Headdy and make their way through 15 side-scrolling levels. The catch in Dynamite Headdy is that — as the name suggests — the main character has to use his head to progress. Quite literally, in this case, as Headdy sports 15 interchangeable heads, all with unique powers. For example, one head is used to smash obstacles in his way, one shrinks him, another lets him bounce, while yet another one turns Headdy into a vacuum cleaner on legs. Using his powers, Headdy has to beat his enemies, face off with bosses, and ultimately take out Dark Demon.

Dynamite Headdy is one of the 3 games included with Gunstar Heroes: Treasure Box Collection.

Headdy, the central protagonist of the game, has come to North Town from the country in order to visit his friends HeadCase, HangMan and Beau, but arrives to find that the evil puppet king Dark Demon is in the midst of attacking the puppet town to select which of the peaceful toys should live and which should be converted into his evil minions. Headdy is captured by the Robo-Collector and rejected by D.D.'s forces, and is dropped into the dust cargo to be thrown into the incinerator. However, Headdy escapes the clutches of Dark Demon's minions and sets off to defeat the evil king.

However, trouble is afoot. Not only is the puppet world filled with Dark Demon's minions, but to reach the evil overlord's castle Headdy must defeat Dark Demon's Keymasters, who serve as the king's elite guard. To make matters worse, Headdy is followed by his lifelong rival Trouble Bruin, a puppet jealous of Headdy's success. Bruin wants to be the star instead of Headdy, and will stop at nothing to get rid of him.