Ultralisk - Sunny Isles Expansion

by SlightlyStartledSeal·v1.0·Updated 2026-02-27

Added a new Darkest Level (Lv. 6 Boss) to the Sunny Isles mod. Requires the Sunny Isles mod.

Screenshots 1 screenshots

About this mod Machine translation

Added a new Darkest Level (Lv. 6 Boss) to the Sunny Isles mod. Requires the Sunny Isles mod.

雷 beast

⚔️ **A new Darkest Level (Lv. 6) boss battle designed for the Sunny Isles mod! **

Ultralisk is a Darkest level boss fight that takes place in the Sunny Isles. Combat is designed to be challenging and requires some pre-planning on the part of the player to defeat.

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🚀 How to activate the Thunder Beast mission

This mission can be unlocked after defeating **Umibozu**. The mission contains a short corridor leading to the Ultralisk fight, so **Torch and Shovel supplies will be disabled**.

🏆 After defeating Thunder Beast

Successfully killing the Ultralisk will make you the target of its follower, the **Iga Crab**. They will continue to hunt you as you move around the archipelago.

  • In any mission, there is a **25%** chance of a group (4) of Iga crabs appearing.
  • Defeating a group of Iga Crabs will reward you with a **Sunny Isles Rarity** or **Very Rare** trinket.
  • On higher difficulties, the chance of dropping Sunny Isles trinkets increases.

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**Important Note**: This mod requires **The Sunny Isles Mod** (or the Sunny Isles Vanilla Mod) as a prerequisite, as it is an extension of its content.

Are you ready to take on this tough and well-designed challenge? Good luck, explorer!

Install & use Install: follow the bundled instructions

  1. Unzip the archive from playbuff and read the bundled readme / instructions first.
  2. There is no universal mod manager for this game: some mods replace game files directly, some go into a game-specific Mods folder, and some need a game-specific community loader or tool first — follow the bundled readme.
  3. Place the files exactly as the readme says; mods with listed dependencies need those installed too.
  4. Launch the game to confirm it loaded; some games require enabling mods in settings or an in-game mod menu.

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

File & checksum

Filename
Raiju 1.0
File size
28.8 MiB