From the game's packaging:

You hear strange, mechanized roar in the distance, and tighten your grip on the laser ray. Suddenly, their shiny heads come into view over the ridge. You blast them and the explode ina fiery flash of steel and iron.

It is the year 2078, Adroids from the Earth, a deadly tribe of mechanized soldiers, warriors, hell-bent on destroying their former masters. --Mankind, longing for the day when robots rule.

You are one of the few surviving rebel guardsment and your mission is to wage war on these mechanical terrorists, and destroy their threat...forever.