Marine Fortress

How to get it

Sail northwest of Marine Starter Island, in the First Sea. The island comes after Frozen Village and before the Skylands in level progression. If you chose the Marines side at the start of the game, you are teleported right next to the castle; Pirates spawn at one of the two ends of the crescent.

What You'll Find There

• NPCs: Parlus, Advanced Weapon Dealer, Marine (quest giver)
• Enemy: Chief Petty Officer
• Boss: Vice Admiral, in the tall central building on the inner side of the crescent
• Raid boss: Greybeard (Lv. 750)
• Black Cape: 50,000 Beli from Parlus, in a hidden area of the fortress (its model was redone by Update 30)
• Guns from the Advanced Weapon Dealer: Cannon, Refined Slingshot and Dual Flintlock
• Love Letter #3 of the Son Quest, at the end of a maze under the castle

Island quests

The source used to read "Defeat 8 Vice Admiral", which we flagged as a typo. It was corrected on 12 September: it is indeed a boss quest, with a single one to beat.

The two hidden passages

• The Love Letter #3 maze starts behind the castle: look for the discolored patch of rock and break it with an attack that can break Instinct.
• The entrance leading to the Black Cape: careful, the source contradicts itself on its location. The island description places it in the frontmost left corner of the fortress, the collectibles list puts it in the southeast tower. Check both sides.

Greybeard and the Bisento V2

• Every 6 hours (4 hours on a freshly started server), the chat shows: "Loud tremors are being heard across the seas...". That is the signal, Greybeard has just spawned.
• If you already own the Bisento and deal at least 10% damage to him, your weapon turns into the Bisento V2. No need to have it equipped, it just has to be in your inventory.
• Greybeard is Lv. 750, which makes him hard to beat for a player at the island's level.

Island Secrets (Update 30)

Like every island reworked by Update 30, Marine Fortress hides three secrets. The Marine's Rumor dialogue option gives you the clue to the current secret.

Raise the Flag. Upon landing at the docks, turn right and head up the watchtower to Parlus: he asks you for rope to hang his flag. The rope is on the most left part of the island seen from the dock, near a small trade stand and a Chief Petty Officer. Bring it to the flagpole next to the Marine quest giver. A minigame starts: stay in the circle to pull the flag up the pole while cannons fire at you.

Pirate Raid. After waiting a while on the island, the chat shows: "Lookouts have spotted pirate sails on the horizon! The fleet will be on the Marine Fortress in 5 minutes!". Five minutes later, pirate brigades spawn offshore on their own (the Island Secrets page removed the "talk to Parlus" step; the Marine Fortress page still mentions it), and you use the fort's turrets to shoot down every ship. Two end messages: "The Marine Fortress stands." then "(your username) drove the pirate brigade off the fortress!". Tip from the source: with the Creation fruit, build temporary structures around the docks so the ships cannot get close enough to target the cannons; a large boat such as a Grand Brigade placed in the right spot does the same job.

Awakened Vice Admiral. When the Vice Admiral awakens, the chat shows: "Military weaponry has been unlocked. An alarm has sounded at Marine Fortress!". The fort cannons start firing: destroy the top half of the center building to stop them, which starts the fight against the awakened boss. End message: "The alarms fall silent." (according to the source since 26 September 2026; it previously gave "(your username) defeated the awakened Vice Admiral!"). Awakened bosses appear every hour, the Secrets Master at Middle Town tells you which one at the end of the hour (the final half hour, his entry has the details), and beating it while dealing at least 10% of its health grants a free roll at the Awakened Boss Gacha.

What you get. Each secret is worth 5 secret levels, so 15 for the island, and once all three are done, Marine Fortress becomes a destination of the Middle Town teleporter, inside the central building. The full step-by-step walkthrough is on the Island Secrets page.

Farming and tips

• Farming the Vice Admiral is one of the best ways to earn Beli in the First Sea. On the Marines side you spawn closer to the castle, which makes the back-and-forth much faster.
• The Blade fruit is recommended here, for its immunity and long-ranged M1.
• Like with the Military Soldiers at Magma Village, you can get the Chief Petty Officers stuck near the edge of the stairs and hit them while they cannot reach you.
• Boats are cheaper on this island, even when you are a Pirate.

Good to Know

• Since the Update 30 rework, the source page describes the island as "anchor-shaped", while still talking about a crescent in several sentences: the shape changed, the wording not everywhere yet.
• It is the only island with two quests where only one targets regular enemies: the first targets the Chief Petty Officers, the second the boss Vice Admiral. Many new players quit here, for lack of a second mob area.
• The last island of a Phoenix raid looks a lot like Marine Fortress, but smaller.
• Before Update 10, the island had a scaffold and a stone floor instead of grass.
• Inside the central building, a truss is placed unevenly.

Update history

Island : Marine Fortress·Released : Update 1

1. Update 30 9 octobre 2026 Adjustment ▾

   • Greybeard's level: 750, not 700. The Marine Fortress page fell in line on 9 October 2026 with the Greybeard page, which already listed Lv. 750; the Greybeard entry said so too, this one was behind.

   See update 30

2. Update 30 26 septembre 2026 Adjustment ▾

   • Secrets Master window: the source has settled on the final half hour (three pages agree since 26 September 2026), the parenthesis says so.

   See update 30

3. Update 30 26 septembre 2026 Adjustment ▾

   • The Awakened Vice Admiral's end message becomes "The alarms fall silent." on the Island Secrets page (the source used to give the generic message).
   • Secrets Master window: the sentence no longer fixes "last ten minutes", as the source has published ten, twenty then thirty minutes; the Secrets Master entry carries the history.

   See update 30

4. Update 30 18 septembre 2026 Adjustment ▾

   • Pirate Raid and Awakened Vice Admiral system messages aligned with the Island Secrets and System Messages pages: "Lookouts have spotted pirate sails on the horizon! The fleet will be on the Marine Fortress in 5 minutes!", "The Marine Fortress stands." and "Military weaponry has been unlocked. An alarm has sounded at Marine Fortress!". The raid starts on its own five minutes after the announcement: the "talk to Parlus" step is gone (the older Marine Fortress page still lists it).

   See update 30

5. Update 30 5 septembre 2026 Buff ▾

   • Island reworked with the First Sea Rework: it is now described as anchor-shaped, new image.
   • Three island secrets added: Raise the Flag, Pirate Raid and Awakened Vice Admiral (5 secret levels each).
   • The Vice Admiral gains a secret awakened version; the Marine gets the Rumor dialogue option.
   • The model of the Black Cape sold by Parlus has been redone.

   See update 30

6. Update 1 vers janvier 2019 Release ▾

   • Added to the game.

   See update 1