Published in GAMES Magazine, March/April 1981 issue, page 52, as an original game by R. Wayne Schmittberger, where 'blades and beaks battle through time . . .' Players pit prehistoric pterodactyls against combat helicopters in a battle to eliminate all the opposing forces or their bases (jungles or airports, respectively).From GAMES Magazine:'How or why the rift in time opened up remains a mystery. One moment all was quiet. Next, the skies filled with the raucous 'Caw! Caw!' of winged prehistoric reptiles, and then the smooth 'Whirr! Whirr!' of gleaming helicopters in hot pursuit . . .' - BoardGameGeek