Contra: The Alien Wars is an online GB game that you can play at Emulator Online. This free Game Boy game is the United States of America region version for the USA. It has been played 2,004 times so far and was posted on March 16, 2017. Contra: The Alien Wars is a single title from the many arcade games, skill games and contra games that we offer for this console. If you enjoyed playing this, then you can find similar games in the gb games category. Contra: The Alien Wars game is from the various retro games on the site, and there are more games like this, including Contra: Hard Corps, Ben 10 Ultimate Alien: Cosmic Destruction and Grand Theft Auto: Chinatown Wars.