This will tell you which games are needed to beat to unlock an art gallery.
Unlockable How to Unlock Art Gallery 1 Beat Metal Slug Art Gallery 2 Beat Metal Slug 2 Art Gallery 3 Beat Metal Slug X Art Gallery 4 Beat Metal Slug 3 Art Gallery 5 Beat Metal Slug 4 Art Gallery 6 Beat Metal Slug 5 Art Gallery 7 Beat Metal Slug 6 Special Art Beat all Metal Slug games
Contributed By: Giga-Ryu.
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