Yeah, FF Adventure was the first in the Seiken Densetsu or "Mana" series. They thought a FF title would sell better in the US than it's Japanese title would. Which is odd, as I don't think they had released an FF2 yet in the States. *shrugs*

And the FF Legend series is just garbage. Crappy battle system, color-by-numbers storylines, and horrible music even for Gameboy.

I heard bad things about Mystic Quest and always steered clear.