A caveman runs around tossing his boomerang at enemy cavemen and prehistoric creatures. Pick up potions to spell out BOOMER RANG'R to move to next level. For even more fun, kill a dinosaur rider and mount his dinosaur!

The player controls Whirley, a caveman armed with a boomerang whose quest is to find a lost treasure in that prehistoric land. As he searches for the lost treasure, must fight off enemy cavemen armed with clubs, dinosaurs and other prehistoric monsters. He must also look out for vultures who drop rocks.
Whirley can also mount a dinosaur and ride it after he kill the caveman who is riding it, and whenever he is riding a dinosaur, he can have the dinosaur breathe fire for a weapon.

The game is also known as Genesis.