In pre-historic times; where ancient dinosaur creatures ruled; the adventures of Dino-Riki began. A courageous and intelligent young man; Dino-Riki; is determined to establish mankind's future in this violent age. Dino-Riki must explore and fight his way through deserts filled with quicksand; sinking lotus swamps; dark caverns; and deep canyons. As Dino-Riki begins his adventure; he is armed with a shooting weapon that will change and progress from rocks to axes; from axes to boomerangs; from boomerangs to fiery torches by collecting [image of fist]. There are many hidden items that will help Dino-Riki to increase strength [image of food]; life [image of heart]; fly like an eagle [image of dove?]; one that will change Dino-Riki to "Macho-Riki" [image of man]; the ancient warrior; and many more. Dino-Riki will need all the ancient knowledge and items he can find before facing the dinosaur bosses: Tyrannosaurus; Pteranodon; Monster Fly; and Giant Cobra.