The 2-player EM version of this game is Gottlieb's 1978 'Pyramid'. The 4-player SS version is Gottlieb's 1977 'Cleopatra'. We previously showed a date for this game of November 1977. The new date is per Gottlieb documentation. Quantity produced for domestic: 349 (includes 70 samples) Quantity produced for export: 1,251 Total quantity produced: 1,600 'Cleopatra' may be Gottlieb's first EM game to supply DC power to the playfield coils. The back cover of its manual lists a VK-448 bridge rectifier among the new items appearing in this game. We are not sure if saying 'new item' meant 'first appearance' but so far no one has contested this. If anyone has access to a Gottlieb EM game having factory-installed rectifiers and made prior to 'Cleopatra', please contact us with your photographs.