Play Contra: The Alien Wars emulator game online in the highest quality available. Contra: The Alien Wars is a Gameboy game that you can enjoy on Play Emulator. This GB game is the US English version that works in all modern web browsers without downloading. Contra: The Alien Wars is part of the Arcade Games, Action Games, and Platform Games you can play here. PlayEmulator has many online retro games available including related games like Alien vs Predator, Alien vs. Predator, and Alien 3.