Metal Slug Anthology [Wii]
Special Music
Successfully complete Metal Slug 1, 2, 3, 4, 5, and X on the Hard difficulty setting with limited continues, and Metal Slug 6 with limited continues to unlock the Special Music.
Tonko art
Successfully complete Metal Slug 1, 2, 3, 4, 5, 6, and X on any difficulty setting with limited continues to unlock the Tonko art.
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