The best Metal Slug game and the soundtrack is half the reason. "Blue Water Fangs (The Island of Dr. Moreau)" opens with one of the most iconic stage themes in the series, naming its horror movie inspiration right in the title.
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"Midnight Wandering" scores the zombie section with creeping dread. "Into the Cosmos" takes the final mission to space with escalating insanity. "Kiss in the Dark" brings stealth tension. "The Unknown World" scores the alien interior.
"Marine Diver" goes deep sea. "Devil's Snow Cave" freezes. The branching paths mean you might never hear every track in a single playthrough. Twenty-eight tracks covering zombies, aliens, yetis, and giant crabs. If you've only heard one Metal Slug soundtrack, make it this one.