The idea of this game is to pick your way across monster infested plains and through treacherous mountain ranges to reach the Pterodactyl's lair. There you must steal the monster's precious eggs and return safely home via mountains and plain, ensuring you are not eaten by a hungry beast on the way. You can only carry one egg at a time, and six are needed to complete a level.
So much for the cassette inlay blurb. The screen display doesn't look quite as thrilling. The lower half (which contains your safe home) has eight rows of various sized pre-historic monsters moving in alternate directions. The top half has four rows of blue coloured blocks with holes cut through. Above them are the six eggs, three to a side and the Pterodactyl on patrol above.