Metal Black/Trivia
- Urban Legend of Zelda: There's a common theory that Metal Black was originally planned as Darius III and then given its own setting in the final days of the development, since the game features cameo appearance of several enemies from Darius. This is entirely not true, as Metal Black was slated to be a sequel to Gun Frontier (marked in the credits as "Project Gun Frontier 2") and shared the same graphical style and a good number of staff members with it, including the designer Takatsuna Senba. However, Metal Black doesn't really have anything to do with that game either; this is because Takatsuna feared that a game with dark atmosphere would not be allowed by the executives, and decided to trick them by tinkering it into a faux tie-in to unrelated game.
- What Could Have Been: Metal Black was originally planned as Darius III, where Proco and Tiat would return from Sol after the events of Darius II, only to find Darius horribly ravaged by the Belser Army. Taito, however, ultimately decided that this was too bleak a scenario for the Darius series, and so gave Metal Black its own setting.