This page contains Metal Slug 3D Unlockables for Playstation 2 called "Completion bonuses" and has been posted or updated on Sep 4, 2007 by Caggigedy. Let us know what you think of this Unlockable by thumbs voting.
You have to finish Story mode as Marco to unlock the Monolith with unlimited ammunition and the Extras menu (with "Mini Game", "Color Edit", "BGM Test", and "Movies" options).
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