74. Metal Storm

Released: 1991
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Fun Fact: A battleship from the unrelated game R-Type appears during one of the boss fights in Metal Storm.

Metal Storm was a side-scrolling shooter and one of the earliest 'Mech games. It featured an interesting mechanic where the player could flip between walking on the ground and the ceiling. Metal Storm was an extremely difficult shooter in the later levels, and one of the games that gave meaning to the phrase “Nintendo hard.”