 Instead of using completely accurate physics, Posehn chose to model movement that he believed players would assume a helicopter would have.He believed players would be put off by physics that didn't match their perceived movement.After the success of the Genesis/Mega Drive version, work began on a conversion for the Amiga, with Gary Roberts (known for a "John Madden" Amiga conversion) and David Colclough (responsible for "") in charge of development.