Binary Design Ltd. was a UK based development studio during the 80's that focused on budget priced arcade conversions for a wide array of home computers such as the Amiga and C64.

Bulldog Software was a publishing label of Mastertronic Ltd.

Mastertronic was a game publisher founded in 1983. It was later bought by Virgin Interactive, being renamed to Virgin Mastertronic and eventually the brand ceased to exist and the assets were completely taken into Virgin Interactive.