[3] Chuck D. Head, a headless mummy created by Dr. Frank N. Stein and his assistant Igor, is sent to defeat Max D. Cap, a demon from the Underworld who commands an army of monsters to conquer the surface world, splitting the skeleton-shaped cluster of islands the land is on into pieces in the process.

After reforming the islands and defeating Max, Chuck sluggishly returns home, where Stein rewards him by transforming him into a human.

The player controls a living mummy, named Chuck D. Head, through various side-scrolling levels to battle an underworld army led by Max D. Cap.

Some levels require the player to collect a certain item for Dr Frank N. Stein, the mad scientist who created Chuck.

Gameplay remains similar between the two games, albeit the graphics, characters, music and level designs have all been changed.

[4] The strip contained a very absurdist and manic sense of humour, making frequent allusions to popular culture, and followed the daily life of Chuck D. Head and the other inhabitants of Castle Frank N. Stein.

Sega Force praised the game's graphics, saying it was "big, bold, colourfully and beautifully animated", while criticizing the gameplay as unoriginal.

[7] Console XS said that Decap Attack is the same game as Magical Flying Hat Turbo Adventure but with gothic graphics and gory killings.