Funny, endearing platformer set in Prehistoric times. Take on the role of Joe or Mac (the latter in 2-player simultaneous play), cavemen protagonists, and try to recover your stolen cavewomen held captive by the enemy tribe. You are able to charge up your weapon attack (you start with stone tomahawks) by holding down the attack button and releasing after a short period-- this attack is wider-range and more damaging. When you reach the captive cavewoman, a boss fight ensues. These are some sort of prehistoric creatures, usually a dinosaur of some sort. Along the way are dangerous terrains like waterfalls, dinosaur skeletons, treetops, volcanoes, etc. Various creatures and cavemen will menace you along the way. Upgrades to your weapon include stone wheels, shadow cavemen, stone daggers, electric charges, etc. The graphics are very well detailed and the sense of humor and amusing characters enhance the fun (but very challenging) gameplay. And to add replay value, you can choose alternate paths to reach the final goal-- and you can get 3 different endings after you beat the final boss, depending on which path you choose! Great, funny platform jumping/shooting game from Data East-- definitely one of their best titles.