Suicide Express

"You are an android called Scih-Berg and you have been sent by your masters to the planet Nilmerg to clear all alien life-form who are against your planets inhabitants from living there.

You have to drive a nuclear train along the planets monorail network over various levels blasting all life-form until you reach 100,000 points and you are able to leave the planet. The aliens will send various vehicles out to destroy you like planes and other trains.