Nintendo Legend writes, "There will always be a few common themes for video game titles. Medieval fantasy role-playing games, secret agent first-person shooters, cartoony platformers are among the most popular. Another brand of home console fun is the kill all the aliens action game. Many titles for the Nintendo Entertainment System tried to capitalize on this key idea, including Star Tropics and Contra. Another contestant in this field was Alien Syndrome, a top-down gunner for one or two players."