DevIslandUnlocked

v1.1.0·Updated 2026-08-22

Unlocks the hidden DevIsland as a sixth navigable island in How to Fish, with a cyan native-style radar marker. Updated for How to Fish 1.0.5.

About this mod Author’s original text

Dev Island Unlocked

Unlock the hidden DevIsland as a normal navigable island in How to Fish.

The game already contains DevIsland, but it is not part of the normal island navigation flow.

Dev Island Unlocked registers it as an additional island and adds a dedicated cyan radar marker.

Features

  • Unlocks the existing hidden DevIsland.
  • Adds DevIsland as a sixth navigable island.
  • Adds a native-style radar point for DevIsland.
  • Uses a dedicated bright cyan / blue radar color.
  • Radar marker follows the game's normal boat radar visibility.
  • Does not replace or modify the normal five islands.
  • Standard BepInEx configuration compatible with HTF Mod Manager.

Important: DevIsland is not moved

DevIsland contains content baked for its original world coordinates.

This mod does not move DevIsland, its meshes, lights, colliders, SpawnManager, IslandHolder, or baked content.

The mod only adds the navigation trigger and radar entry required to reach the existing scene at its original position.

Radar

DevIsland appears on the radar using a dedicated cyan color so it is easy to distinguish from the game's original island markers.

The radar remains controlled by the game itself: the DevIsland marker only becomes visible when the normal boat radar is active.

Configuration

After launching the game once, the configuration file is created at:

BepInEx/config/com.howtofish.devislandunlocked.cfg

Available settings include:

[General]

Enabled = true

[Radar]

ShowDevIslandDot = true

[Debug]

VerboseLogging = false

If HTF Mod Manager is installed, these settings can also be edited from the in-game MODS menu.

Requirements

  • How to Fish
  • BepInEx 5 / Mono

Installation

Install with a -compatible mod manager, or manually place:

DevIslandUnlocked.dll

inside:

BepInEx/plugins/DevIslandUnlocked/

Version 1.1.0

Compatibility update for How to Fish 1.0.5.

  • Updated DevIsland navigation compatibility for How to Fish 1.0.5.
  • Keeps DevIsland at its original baked world position.
  • Keeps the cyan native-style radar marker.
  • Preserves the normal five islands and the game's normal radar behaviour.
  • Keeps BepInEx configuration and HTF Mod Manager compatibility.

Game compatibility

Tested with:

How to Fish 1.0.5

BepInEx 5.4.23.5

Install & use Install: follow the bundled instructions

  1. Unzip the archive from playbuff and read the bundled readme / instructions first.
  2. Most mods rely on the game's mod loader — the usual route is a community mod manager (such as r2modman): pick this game, install, and it handles the loader and dependencies.
  3. For a manual install, put the mod files into the matching Mod / plugins folder inside the game directory.
  4. Launch the game to confirm it loaded; mods with listed dependencies need those installed as well.

Install locations vary a lot between mods — the bundled readme is the most reliable guide.

Dependencies

Install these first, or the mod will not work:

BepInEx-BepInExPack

File & checksum

Filename
DevIslandUnlocked-1.1.0.zip
File size
154.9 KiB