One or two players can take their pick of three helicopters, each with their own firing pattern and battle oncoming waves of enemies through 7 different stages, each with a boss at the end. Each boss has a different form at the beginning, such as a train, boat, airplane, or submarine, but after the players have inflicted enough damage, it turns into a giant robot. After the players destroy the robot, the stage ends and they progress on to the new stage. There are 9 modes of difficulty, ranging from "Child", where enemies fire little to none when fired upon to "Very Hard", where enemies fire at almost any given moment.