As Bart Simpson, you must use all your skills and the help of your family to stop an alien invasion from conquering the Earth! Your X-ray specs will help you I.D. the aliens. Collect evidence to convince the other Simpson family members to join the fight, and together you can save the day!
Not surprisingly, the Genesis version of Bart vs. the Space Mutants features superior graphics and sound compared to the NES. Otherwise pretty much the same game.