Ikari II : Dogosoken

The story picks up directly at the end of Ikari Warriors. Congratulated by General Kawasaki for saving him, Paul and Vince (also named Ralf and Clark) return to their homeland in a plane chartered by the general. A mysterious storm appears and they are thrown thousands of years into the future (or another dimension!). They are greeted by an alien creature who tells them that the evil Zang Zip (Zangelt) has taken over this world.

To help them get home, use their old firearms and new ones to defeat more and more enemies like cyclops green men, stone headed beasts and the evil Zangelt.