A recent earthquake has created an opening at the earth's surface that extends all the way to Trollsville, exposing all of the underworlds to our surface pests. Carrying new diseases and pilfering all natural resources, these pests pose the greatest threat to the underworlds since toxic waste sites. The elders of Trollsville had quickly called a meeting to discuss the impending danger of an invasion of surface creatures.

It was decided that while this rift remained open, the twelve Underworlds of the earth would have to be defended. A call rang out for the strongest and most courageous of all Trollsville's citizens to defend the motherland. Only two stepped forward, well stumbled actually, and accepted this dangerous task. The Bonkheads brothers, while not Trollsville's brightest or swiftest inhabitants, were more than willing. Of course it was only some time later, when their ears had finally cleared from the ringing of the emergency bell, that Grag and Thog realized that the elders had said "protect the rift" not "collect the gift". However, with promises of medals of honor and a case of chewing gum, the brothers began their ascent toward the surface.

Armed with only an incredible tolerance for pain and rock solid craniums, Grag and Thog made their way to Surfaceville...

It is your task to help two of Trollsville's thickest skulled inhabitants clear out all of these deadly pests. Trollsville's wisest elder, Huntho, will help guide you along the way. Listen carefully to what he says and watch for magical gems and other powerful objects.

To rid the Underworlds of pests, jump up and bonk your head on a section of platform directly below a pest. This will render them unconscious. While still unconscious, the beast can then be kicked out of the underworld. Watch out though, if they manage to wake up before you can get to them, then they will be meaner than ever. Avoid all pests when they are conscious.

If any pest manages to reach the bottom platform and exit the screen, they will send out a call for another of their kind to come along. These subsequent creatures are usually a lot less fearful and offer a much greater threat to you.

An entire case of TNT can produce three full blasts that will knock out any pests that are touching a platform at the time of the explosion. These can be detonated by bonking the crate from below. Additional charges can be obtained by finding the Blastidian gem or reaching a new underworld. Try to find gems by bonking different areas of the platforms; you may free a gem that was hidden there.