The player assumes the role of Rex, Bloop, Spike, or Gwen, small Theropod-like dinosaurs in the land of "Og", home to the one-eyed cavemen known as the "Trog". In the NES rendition of the game, only Bloop and Spike are playable. Players must pick up all colored eggs lying around the map as the Trog cavemen wander around, attempting to eat them. Unlike its influential predecessor, Pac-Man, the dinos can attack at any time with a punch that does not require a power-up. (wikipedia)