Etrian Odyssey III: The Drowned City, The Southern Sea, by Zach.
Notes: I wish I had made notes on the in-game map that says what item you get from what little island, because then this would have been a little bit more interesting. Sadly, all I remember is that you get sheep cheese from the island north of the main port.
[Josh says: this is just super great. And EO is a wonderful game as far as meta-level map stuff goes, what with the built-in drawing-a-map-on-graph-paper game mechanic.]