These hacks usually change most/all of the graphics, and may modify (but rarely replace) the music, but nothing else. Inventor is only explicitly credited in a small number of these so the extent of its involvement is unknown. Many of them have alternate versions on Famiclones made by Advance Bright Ltd. Several hacks have typos in the game title. For unknown reasons, the 1st-gen lightgun games have many more hacks than the rest.