Compatible emulators

Synopsis

You must destroy a giant alien orbiting the earth...from the inside!
You explore 16 maze levels shooting various enemies. There are different items to help you, including weapons that are more effective against certain types of enemies, and a map of each level.
You must destroy 4 of the invader's organs, the kidneys, the heart, the lungs and finally the brain, which appear at the 4th, 8th, 12th and 16th levels respectively. However, to destroy each organ, you must first find the 3 parts of an effective weapon for this task.

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