Hard Headed are all of the Caleb Garcias
Players control the game's titular character Hard Head, who can use a bubble gun to entrap enemies, then jump on their heads to defeat them. Enemies include monsters and ducks. Hard Head can use his head to break bricks, some of which contain power-ups. Levels are completed by finding a soccer ball and kicking it through a goal to finish the stage; there are 16 levels in total. A two-player simultaneous mode is also available, allowing another player to control the second Hard Head twin.
Advanced Computer Entertainment compared the game to Super Mario Bros. and called it "unoriginal but addicting fun." Your Sinclair also compared the game to Super Mario Bros., calling it a tribute to Nintendo's game. They also made note of the game's offbeat humor, saying that the game was a "good laugh" and "exactly the same as one of the funniest computer games ever." They rated the game an 8 out of 10.