The eponymous Panzadrome is an island inhabited solely by robot tanks of varying viciousness. You have been given the task of destroying all the robots on the Panzadrome...
Each robot tank is remotely controlled from a central computer, from which it gets its power. Plasma vents are a central part of the power grid, and they have to be destroyed in order to knock out both the computer and tanks. The computer is well aware of this weakness, though, and wherever you find a vent there is also a strong guardian force as well. Apart from the tanks you also have to cope with heavily armed fun emplacements which fire on any intruders.
Due to budget restrictions, you have been given a very sub-standard tank with a one-shot turret and stone wheels! Fortunately, factory depots are scattered around the island, each specialising in a different type of tank component. You can visit these factories and collect whatever system a factory makes.
Though the robot part stores are unaware that you are an intruder, the computer's tanks will recognise you immediately and try to destroy you. Three weapons systems are available to you, although at the start you only have the worst - a on-shot turret. The others are mortars and mines, both of which must be collected from the appropriate factory.