Raider

Evil Dr. Smenk has attacked and conquered the planet Daikon and made all the inhabitants slaves and transported them to Zincros, a penal colony. You have managed to escape and have decided to take back the planet by entering the city of Daikon, via underground caverns and destroy nuclear pods and weapons. Raider is a side view horizontal shooter where the screen scrolls constantly from left to right. You move you spacecraft up or down and you have a cannon and bombs to help you in your mission. You must avoid the sides of the caverns as well as any pods or weapons you encounter, and if you touch any then you lose one of three lives. As you fly, your fuel gauge decreases but shooting or bombing pods increases it.