A very old fashioned game.

The gameplay is very simple and very addictive. You control Duke in the car at the bottom of the screen. His mission is to shoot out all the windows of the train in order to release the travelers. Why they don't just get off at the next station I don't know. There are of course obstacles in your way. There is another train in front of the one you're aiming at and if your bullet hits the side of it it'll ricochet of and come straight back at you. Later on there are helicopters that drop bombs on you from the sky.

The levels are identical apart from the introduction of van obstacles and helicopters after level 2. This isn't exactly very deep or modern looking but it's still a lot of fun.