Once Human: Isles of Abyss goes live on October 22, 2026 — which is October 21 PT. That one-line split is the whole reason "what time does Isles of Abyss release" is being searched: the studio published the date as "October 22 (Oct 21 PT)", so North American players on Pacific time see it drop the evening before the 22nd, while Europe, Asia and the rest of the world get it on the 22nd. This guide gives you the confirmed date, how the Oct 21-vs-Oct 22 split works region by region, what we know (and don't know) about the exact clock time and server maintenance, whether there's a preload, and exactly what to have ready when the servers come back up. Every date below is checked against Starry Studio's own announcement — no invented hour.
Quick answer: when does Isles of Abyss go live?
- Global release date: October 22, 2026 — October 21 PT for Pacific-time players.
| - Platforms, all at once: PS5 / PS5 Pro, Xbox Series X | S (including Xbox Game Pass), PC (Steam/Epic) and mobile (iOS/Android) — one synchronized launch, full cross-play and cross-progression. |
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- Price: free. Isles of Abyss is a free update; Once Human is free-to-play on every platform.
- Exact clock time: the studio has published the date (Oct 22 / Oct 21 PT) but, as of September 23, has not published an exact go-live hour in the launch announcement. Once Human's major updates have historically gone live after a maintenance window in the afternoon Pacific time — treat any specific "16:00 PT" figure you see elsewhere as an estimate, not a confirmed time, until the pre-launch maintenance notice posts.
- Countdown: from September 23, that's 29 days to the global October 22 date.
Want the full breakdown of what's actually in the expansion? This page is the timing guide.
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For the confirmed date and overview, see the Isles of Abyss release-date guide; for the content deep-dive, read everything new and how it plays; and to be ready on the day, follow the pre-launch prep checklist.
Why the date shows as "October 21 PT" and "October 22"
Starry Studio announced Isles of Abyss with the wording "October 22 (Oct 21 PT)" in its September 21, 2026 release-date reveal (surfaced at the Xbox Tokyo Game Show 2026 broadcast). Both dates describe the same moment — they just fall on different calendar days depending on your time zone.
Here's the mechanism, and it's the exact same trap as the console launch: Once Human is a Chinese-developed, globally-published game, and Starry Studio anchors its headline dates to Pacific Time (PT). When a launch lands in the evening Pacific time, it's already the next calendar day across the Atlantic and in Asia. So:
- If you're in California (PT), the update arrives on your October 21 evening.
- If you're in New York (ET), it's late on October 21 or the small hours of October 22.
- If you're in London, Berlin, Delhi, Tokyo or Sydney, it lands on October 22 local time.
This is the same "August 25 vs August 26" split that confused players at the console launch, when the 11:00 PT go-live read as August 26 across Europe and Asia. Nobody is wrong — the date just crosses the international date line differently depending on where you live. Don't "correct" a friend who says the 21st if you say the 22nd; you're both right.
Isles of Abyss release time by region
Because the studio hasn't posted an exact hour yet, the table below converts the date correctly and flags the hour as pending. Update it the moment the official pre-launch maintenance notice drops on the Once Human news page.
| Region | Local date it lands | Notes |
|---|---|---|
| US West (PT) | October 21, 2026 (evening) | The headline "Oct 21 PT" date. |
| US East (ET) | Late Oct 21 → early Oct 22 | Straddles midnight depending on the exact hour. |
| UK (BST/GMT) | October 22, 2026 | Morning/daytime of the 22nd. |
| Central Europe (CET) | October 22, 2026 | |
| India (IST) | October 22, 2026 | |
| Japan / Korea (JST/KST) | October 22, 2026 | |
| Australia (AEDT) | October 22, 2026 |
⚠️ These are date conversions. The precise hour follows the official maintenance window, which had not been published at the time of writing (September 23, 2026). Watch the official news page for the "pre-launch maintenance" post.
Will there be server maintenance at launch?
Almost certainly yes — that's how every major Once Human version has shipped. New content of this size (a whole ocean scenario, five sea regions, ship-building) arrives after a scheduled maintenance window, during which servers go offline, the client updates, and then servers reopen with the new content live.
What that means for you on the day:
- Expect downtime, not an instant switch. When the maintenance clock starts, you'll be logged out. The expansion is playable once servers come back up, not the second the clock hits the date.
- The maintenance notice is where the exact hour appears. Starry Studio typically posts a "version update / maintenance" notice a day or two ahead with the precise start time and expected duration. That post — not a third-party countdown site — is the authoritative source for the go-live minute.
- Larger patches, longer windows. The studio has already been pre-loading Isles of Abyss map resources in stages across recent updates (which is why recent patch downloads were bigger than usual), specifically to keep launch-day maintenance manageable. That's a good sign for a shorter window, but plan for a couple of hours offline regardless.
Is there a preload / pre-download for Isles of Abyss?
Partly — and this is the useful part. Because the studio has been staging Isles of Abyss assets into recent patches ahead of time, a chunk of the expansion's data is already landing on your device through the normal update cadence before October 22. That's deliberate: it spreads the download out so launch day isn't a single massive grab.
Practical steps before the 22nd:
- Keep the game updated. Install every routine patch between now and launch so you're not downloading everything at once on the day.
- Free up storage. Once Human's console install has run large (the official console FAQ referenced installs in the 80–100 GB range), and an expansion this size only adds to it. Clear space now so the launch-day update isn't blocked.
- On console, enable automatic updates (PS5: game → Options → Manage Game Content; Xbox: game → Manage → Updates) so the launch patch is ready when you sit down to play.
There's no separate "beta preload" for the public launch — the NA closed Final Test (September 16 – October 8 PT) was a separate, NDA-bound, invite-only test with its own client and a full data wipe. It is not the public build, and its content is under embargo. The October 22 launch is the version everyone plays.
When do the new Isles of Abyss servers open?
This is where Once Human's structure matters, and it's the question that trips up new console players. Once Human runs on a scenario + server model, not a single global shard:
- Isles of Abyss is a new maritime survival scenario. To play it, you sign up for a server running that scenario through Scenario Selection.
- Server-opening days differ by region. Once Human staggers new-scenario server openings across NA, EU, SEA, SA, HK-MO-TW and JP-KR — they don't all open on the same weekday. Expect a wave of new Isles servers to open around and after launch on each region's normal schedule, at 08:00 local (the studio's standard server-open hour for new scenarios).
- You don't lose your existing character. Starting a new scenario resets your in-scenario level and map progress, but your blueprints, Mods, cosmetics, story progress and key currencies carry over — that's the whole point of the scenario system. (See exactly what carries over and what resets between scenarios.)
Because the exact per-region server calendar for Isles of Abyss hadn't been published as of September 23, don't commit to a specific server-open weekday yet. The pattern to expect: global content unlock on Oct 22 (Oct 21 PT), then region-staggered scenario servers opening on each region's normal cadence.
What actually unlocks when the servers come back
So you know it's worth setting an alarm, here's what the studio has confirmed lands with the expansion — billed as the biggest Once Human content drop since the game's 2024 launch:
- Ship-building. Build and upgrade custom vessels — from small boats to large mobile sea fortresses — that double as mobile bases, workshops and weapons platforms.
- Five sea regions plus island exploration, the open ocean surface, and underwater / deep-sea areas to dive and gather resources in.
- New ocean threats, including predatory lighthouses and "living islands," and a deep-sea endgame tied to "The Sunken Lord," an ancient entity lurking beneath the water.
- One connected survival loop across land, sea and diving — your existing progression feeds straight into the naval content.
- Free, for everyone, on every platform — including day-one access for Xbox Game Pass subscribers.
Launch-day checklist
Have these done before the countdown hits zero so you're playing, not patching:
- Update the game now and after every patch between now and October 22 to soak up the staged Isles data.
- Clear storage — leave headroom above the game's already-large install.
- Enable automatic updates on your console so the launch patch applies overnight.
- Link your accounts before launch if you play across PC/mobile/console — remember linking is not merging: if both accounts already have characters, you keep only one set. Do this well ahead of the day.
- Watch the official news page for the pre-launch maintenance notice — that's where the exact go-live hour and downtime window will appear.
- Decide your region and server so you're ready to jump into a new Isles scenario when servers open.
FAQ
What time does Once Human Isles of Abyss release? The confirmed launch date is October 22, 2026 (October 21 PT). Starry Studio has not published an exact clock hour in the release-date announcement as of September 23, 2026 — the precise go-live time will appear in the official pre-launch maintenance notice a day or two before launch. Once Human's major updates typically go live after an afternoon-Pacific maintenance window, but treat any specific hour you see before that notice as an estimate.
Why does the date say both October 21 and October 22? Starry Studio anchors its headline dates to Pacific Time. "October 22 (Oct 21 PT)" is a single moment that falls on October 21 for Pacific-time players and October 22 for Europe, Asia, Australia and most of the world. It's the same time-zone split as the August 25 (11:00 PT) console launch that read as August 26 in the EU and Asia. Both dates are correct.
Is there server maintenance for the Isles of Abyss launch? Expect a scheduled maintenance window like every major Once Human update. Servers go offline, the client updates, then servers reopen with the expansion live — so plan for downtime rather than an instant unlock. The exact start time and duration come in the official maintenance notice.
Can I preload Isles of Abyss? There's no separate public "preload," but the studio has been staging Isles of Abyss map assets into recent routine patches to spread the download out ahead of launch. Keep the game updated and enable automatic updates so most of the data is already on your device before October 22. The NA Final Test (Sept 16 – Oct 8 PT) was a separate NDA closed beta, not the public build.
| Is Isles of Abyss free? Yes. Isles of Abyss is a free update, and Once Human is free-to-play on PC, mobile, PS5/PS5 Pro and Xbox Series X | S. Xbox Game Pass subscribers get access at launch too. |
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Do I need a new character or server to play it? Isles of Abyss is a new maritime scenario, so you'll join a server running it. Your account, blueprints, Mods, cosmetics, story progress and key currencies carry over between scenarios — you're not starting from scratch, just resetting in-scenario level and map progress for the new world.
When do the Isles of Abyss servers open in my region? The global content unlocks on October 22 (Oct 21 PT). New-scenario servers then open on each region's normal staggered schedule — NA, EU, SEA, SA, HK-MO-TW and JP-KR don't all open on the same weekday — typically at 08:00 local. The exact per-region Isles server calendar hadn't been published as of September 23; check the official server schedule post closer to launch.
