The Pharaoh's kingdom has been placed under the curse of Anubis, the god of the dead. As the son of the Pharaoh, you embark on a journey to break the curse. Your main objective is to acquire enough treasure to offer at the Temple of Ra, the source of light and life. If Ra excepts your gifts, the curse will be broken. In order to obtain treasure you will need to make the proper offerings at each of the following destinations: the pyramids, the Phoenix, the Temple of Isis, the Temple of Anubis and the Sphinx. When each offer is accepted you will be rewarded with a valuable treasure. Throughout your journey you will battle thieves and scorpions. You will also need to barter with nomad traders and dig for treasure.
Riddle of the Sphinx requires the use of two joysticks, as one of them must be used to access your treasure menu.