The game takes place in the 22nd century. Scientists developed a new technique that allowed them to merge the DNA of humans and animals, producing powerful creatures known as "gears". The characters of the game participate in a tournament, the winner of which would face a gear who went out of control and is threatening to lead a gear rebellion against the humans. The game allows you to play as familiar characters from Guilty Gear Petit , such as Sol Badguy, Ky Kiske, Fanny, and Dr. Baldhead.
Guilty Gear Petit is a 2D fighting game. In the story mode, you can pick a character and take them through a series of fights, while in time attack mode you can choose your opponents freely. The graphics are done in "super-deformed" style. The gameplay retains key ingredients from Guilty Gear , such as building tension to execute powerful attacks and combo moves.
Guilty Gear Petit was released on the WonderSwan Color in 2001, offering a unique blend of familiar characters and gameplay mechanics.