Quick answer: In Once Human's Isles of Abyss ocean expansion — launching October 22, 2026 (October 21 PT) free on PS5, PS5 Pro, Xbox Series X and S (including Game Pass), PC and mobile — your ship is your base. Starry Studio's official reveal confirms you craft, customize and upgrade a vessel from an agile skiff all the way up to a massive "Mobile Sea Fortress," turning it into "a fully functional base, workshop, and heavy artillery platform." How you build it decides how you survive the ocean, because the sea itself is a living, hostile entity called The Sunken Lord. This article covers only what the studio has officially confirmed about the shipbuilding system ahead of launch — not leaked test details.
Key takeaways
- Your ship replaces your land base as the center of the loop. The official announcement frames each vessel as a base + workshop + weapons platform you sail between islands — not just a vehicle.
- The progression ladder runs skiff → Mobile Sea Fortress. Starry Studio's exact words: "craft, customize, and upgrade their vessels from agile skiffs to massive Mobile Sea Fortresses."
- Ship design is a tactical choice, not cosmetic. The studio says "how players design their vessels directly dictates their tactical approach to oceanic hazards."
- Survival spans three connected layers — sailing the surface, exploring islands, and diving deep underwater — across five distinct oceanic regions.
- Isles of Abyss is free and cross-platform on launch day, with full cross-play and cross-progression, so your main account carries straight in.
- This guide is pre-launch (October 4, 2026). Exact build costs, module lists and ship tiers have not been published outside the NDA closed test, so treat any specific number you see elsewhere as unconfirmed until October 22.
What is Isles of Abyss, and why does shipbuilding matter?
Isles of Abyss is Once Human's Ocean Expansion — billed by developer Starry Studio (NetEase Games) as "the largest content update in Once Human's history since its 2024 launch." It takes the game's Stardust-polluted world and extends it into "a vast, uncanny ocean" dotted with scattered islands and split across five distinctive sea regions. (Source: official Starry Studio press release, Hangzhou, September 21, 2026.)
Here's why shipbuilding is the headline, not a side feature: in the base game your territory — your land base — is the anchor of everything you do. In Isles of Abyss, the ocean is the map, and the thing that carries you, houses you, crafts for you and fights for you is the ship you build yourself. The studio describes a "Land-Sea Dual Survival Loop" where your vessel becomes the mobile hub that ties it all together. If you've played the land scenarios, the mental shift is this: your base now floats, and it moves with you.
That makes "how does shipbuilding work?" the single most important question for anyone jumping in on October 22 — whether you're a two-year veteran or a brand-new console player who arrived at the 2026 console launch.
How does shipbuilding work in Once Human Isles of Abyss?
Starry Studio's reveal lays out the system under the banner "Unprecedented Freedom of Shipbuilding." The confirmed description, verbatim:
"Players can craft, customize, and upgrade their vessels from agile skiffs to massive Mobile Sea Fortresses. Transform your ship into a fully functional base, workshop, and heavy artillery platform. How players design their vessels directly dictates their tactical approach to oceanic hazards, encouraging creative problem-solving and adding immense gameplay depth."
Break that into the three things it actually promises:
1. A build-and-upgrade ladder, from skiff to sea fortress
You don't get handed a finished boat. You craft a small, nimble starter vessel (an "agile skiff"), then customize and upgrade it over time toward the top end: a Mobile Sea Fortress. That mirrors the core Once Human progression you already know — start fragile, grind materials, climb to something formidable — except the thing you're upgrading is the vessel you live on, not a fixed plot of land.
2. The ship is a base, a workshop and a weapons platform
This is the line that changes how you'll play. The studio explicitly says you "transform your ship into a fully functional base, workshop, and heavy artillery platform." In practice that means a single vessel is meant to combine the roles you currently split between your territory (storage, crafting stations, shelter) and your loadout (firepower). Expect to make real trade-offs: more workshop space versus more guns, speed versus durability, a lean scout boat versus a slow floating fortress.
3. Your design is your strategy
Starry Studio frames ship design as a tactical decision: "how players design their vessels directly dictates their tactical approach to oceanic hazards." Translation — there is no single "best ship." The right build depends on what the ocean throws at you and how you want to fight it. A player who leans into heavy artillery plays the sea very differently from one who builds for speed and evasion or cargo and crafting throughput.
What we are NOT claiming: the exact crafting materials, the full module/part list, the number of ship tiers, and specific upgrade costs have not been published outside the NDA closed beta. We'll update this guide with the real numbers the moment the launch patch notes go live on October 22. Any site quoting precise ship stats or costs today is reading test-state data — treat it as unconfirmed.
The Land-Sea Dual Survival Loop: three layers your ship ties together
Your ship isn't just for crossing water. The expansion's survival loop, as the studio describes it, spans three seamlessly connected layers, and your vessel is the thread through all of them:
- The sea surface — "navigating treacherous sea surfaces." This is where your ship lives: sailing between islands, dodging or fighting oceanic hazards, and acting as your mobile home.
- The islands — "exploring mysterious islands." Scattered landmasses to explore, gather on and build at. Your ship is how you reach them and how you haul what you find.
- The deep — "diving deep underwater for buried treasures and aquatic resources." Submerged salvage and resources that feed back into — you guessed it — building and upgrading your ship.
Crucially, the studio says "each layer feeds directly back into core player progression, creating a rich, mutually sustaining survival economy between land and ocean." So underwater salvage upgrades your ship, a better ship reaches tougher islands, tougher islands yield better materials, and the loop compounds. You'll navigate this across five distinct oceanic regions, and the ocean "acts as a massive, hostile entity watching your every move."
The ocean is alive: The Sunken Lord and Malla's six rules
The reason your ship has to be tough is lore made mechanical. At the heart of Isles of Abyss is "The Sunken Lord" — the studio's reveal calls it "an ancient, awakening entity," where "the sea is not merely an environment, but an ancient, awakening entity… something vast and hostile watches every surge of the tide."
The Release Date Reveal Trailer introduces Malla, "an enigmatic navigator who has drowned a thousand times," who warns of six critical rules from her logbook. Those rules exist to flag the ocean's lethal traps — the studio names "predatory lighthouses" and "disguised, living islands" as examples of hazards you'll have to design your ship and your route around. You won't just be fighting monsters; the environment itself is the boss, which is exactly why "how you build your ship directly dictates your tactical approach."
How shipbuilding fits Once Human's existing progression
If you're already playing, a fair question is: do I lose my character, my blueprints, my Mods when I sail into a new scenario? Isles of Abyss is a new scenario, and Once Human's normal carry-over rules apply — your permanent progression (weapon and armor blueprints and their star ratings, Mods, formulas, Main/Side Story progress, and core currencies) travels with you, while your character level resets and your land base doesn't come with you. Your in-world territory and crafted items route through Eternaland the way they do at any scenario boundary.
If that's new to you, read these first — they'll save you from torching progress right before launch:
- What carries over and what resets when a scenario ends
- Eternaland explained: how it works and exactly what it preserves
- How to prepare for Isles of Abyss before October 22
The practical takeaway: your blueprints and Mods carry in, so you can rebuild gear fast, but you'll be building your first ship from scratch inside Isles of Abyss, not importing one. Spend the days before launch finishing your current build and banking persistent progression rather than hoarding temporary crafted gear that won't make the trip.
When can you start building? Launch details
- Date: October 22, 2026 globally (October 21 PT).
- Price: Free update for all players — no box price, consistent with Once Human's free-to-play model on every platform.
- Platforms: PS5, PS5 Pro, Xbox Series X and S (including Xbox Game Pass day-one), PC and mobile.
- Cross-play & cross-progression: Full, across all platforms — your existing account and its permanent progression carry straight in. (See crossplay and cross-progression explained if you need to link accounts first; link before you create any new character so you don't lose one.)
For the exact go-live time in your region and a countdown, use our Isles of Abyss release time guide, and for the full feature rundown see everything new in Isles of Abyss and how it plays.
FAQ
Can you really build your own ship in Once Human Isles of Abyss? Yes. The official reveal confirms a full shipbuilding system where you "craft, customize, and upgrade" vessels, scaling from a small skiff up to a large "Mobile Sea Fortress." Your ship is designed to double as your base, workshop and weapons platform.
What is a Mobile Sea Fortress? It's the top end of the ship progression ladder as described by Starry Studio — a massive, upgraded vessel that functions as a fully-featured mobile base and heavy artillery platform, rather than a simple boat. The studio hasn't published the exact tiers between a starter skiff and a fortress yet; expect the specifics in the October 22 launch notes.
Do I need to rebuild my whole base for the ocean? Your land territory does not sail with you into a new scenario, so yes — in Isles of Abyss your ship becomes your mobile base, and you build it inside the scenario. Your permanent blueprints and Mods carry over, so you can craft gear quickly, but the vessel itself is built fresh. See what carries over and what resets before you leave your current scenario.
Is Isles of Abyss PvP or PvE? Starry Studio's official description reads as a maritime survival experience against the environment — the ocean itself (The Sunken Lord) is the central threat. The studio has not published a hard "PvP" or "PvE" label for the live mode, so treat a definitive tag as unconfirmed. We cover the evidence in detail in our Isles of Abyss PvP-or-PvE breakdown.
How much does the ocean expansion cost? Nothing. Isles of Abyss is a free update for every Once Human player on October 22, 2026, across PC, console and mobile.
Is there a best ship build? Not a single one. The studio explicitly ties ship design to tactics — "how players design their vessels directly dictates their tactical approach to oceanic hazards." Your build should match how you want to deal with the sea: firepower, speed, or crafting-and-cargo throughput. Once the system is live on October 22 we'll add tested build recommendations.
The bottom line
Isles of Abyss turns your ship into the thing you'll care about most: it's your home, your factory and your gunship all at once, and the way you design it is the way you survive an ocean that is actively trying to kill you. Everything above is drawn from Starry Studio's official October-22 reveal — the full build ladder, part lists and costs land with the launch patch, and we'll update this guide the day they do.
Playing across PC, PlayStation and Xbox? Once Human is free on every platform with full cross-play and cross-progression — link your accounts before you create a new character so none of your progress gets stranded.
Last updated October 4, 2026. Facts sourced from Starry Studio / NetEase Games' official Isles of Abyss reveal (September 21, 2026) and the Release Date Reveal Trailer. Pre-launch guide — exact ship tiers, parts and costs will be confirmed at the October 22, 2026 launch.
