Quick answer
The current progression guide lists five islands in order: Lighthouse, Forest, Desert, Rocks, and Volcano. The repeatable unlock pattern is NPC quest → main boss → return the important drop → receive coordinates; the next island then appears as a coloured Radar marker.
Island order and unlock route
| # | Island | How you enter | What advances the route | Next Radar marker | Source |
|---|---|---|---|---|---|
| 1 | Lighthouse Island | Starting island; no unlock required. | Use the Empty Beer Can to summon Spider Crab, then return its meat to receive boat keys. | Forest Island appears as a green Radar marker. | |
| 2 | Forest Island | Follow the green Radar marker. | Collect three Leeches, use the Modified Leech to summon Giant Piranha, and return its Skeleton. | Desert Island appears as a yellow Radar marker. | |
| 3 | Desert Island | Follow the yellow Radar marker. | Give the Tourist an endangered creature, use the Carrot to summon Pufferfish, and return its Fin. | Rocks Island appears as a red Radar marker. | |
| 4 | Rocks Island | Follow the red Radar marker. | Catch Tuna with the Professional Boss Lure, place it on dry ground to summon Albatross, then return the Albatross Head. | Final coordinates lead to Volcano Island. | |
| 5 | Volcano Island | Follow the pink Radar marker; this is the final island. | Complete the scientist's quest and prepare for the final boss. | No later island is listed. |
How to use this route
Treat the marker colour as navigation context, not a replacement for the active quest. If a marker does not appear, re-check the NPC hand-in and the important boss drop before assuming the island order changed.
Related routes
- walkthrough — main guide
- beginner — related guide
- speedrun — related guide