Battle Unit Zeoth ROM

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Battle Unit Zeoth is a scrolling shooter video game developed by Jaleco for the Nintendo Game Boy in 1990 which saw a release in North America and Europe one year later in 1991. Battle Unit Zeoth takes place in the future where mankind is invaded by a race of alien robots known as the Grein. Forty-two years ago, the humans of Earth united to drive out the first invasion of the Grein aliens in a fierce and costly war.

However, as the Grein retreated, they left behind a secret underground base filled with self-replicating Grein machines. Players control the Zeoth mecha using jet-powered thrusters to propel the battle unit through the air, and can fire weapons in four directions (left, right, up and down) to destroy Grein enemies. The game includes five stages which include New Age City, the underground base, and the Grein’s mechanical command headquarters.

The odd-numbered stages are horizontal scrolling stages while the even-numbered stages are short, vertically aligned platform stages. Each stage ends with a boss fight. Players receive points by destroying enemies and clearing stages which contribute to their score, but the high score is not saved and is lost when the Game Boy is turned off.