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. If you hit a vehicle or bullets and missiles then you lose one of three lives. You have a limited amount of ammo but you can pick up extra along the way but if you have 50 or more then it's a loss of life.