The Mysterious Update, Explained
The Mysterious Update (July 30, 2025) added the post-game 'meta' layer: collect the black crown on Serpent's Stack to reveal wall ciphers across the isles, then hunt 30 pyramidions, 5 meteorites and 11 new stars. The current patch, v2.6a, lowers the pyramidion quest gate to 110 stars.
The Mysterious Update is the free expansion that turned Isles of Sea and Sky's ending into a beginning: a post-game layer of wall-reading, collectibles and community puzzles, layered onto the base game over a year of patches after launch.
What it added
- The circlet and wall reading — a crown on Serpent's Stack that decodes the island murals into a full glyph language.
- 30 pyramidions with their own achievement tiers — full guide.
- 11 new stars (109 → 120 total): eight from paired-elemental rooms across the four main islands, one below the snake island landing, one in Tidal Reef's hidden shells, one below the Frozen Spire birds.
- More obsidian — the black gem count rose to 18.
- 5 meteorites and the sleep-spot meta that reveals their symbols.
- The spiral teleport network — push boxes along the spirals to link islands, then trace patterns (the 6th pattern comes from Lost Landing's moss writing).
- The Frozen Spire A1 meta puzzle rework (v2.3d) — the room the community now treats as the game's hardest (guide).
How to start it
- Finish the main story (the update's content expects fully-equipped play; walkthrough).
- Get the circlet on Serpent's Stack — push a normal block onto black smoke to reach the crown's area.
- Start reading walls (secrets) and hunting pyramidions (pyramidions).
Patch timeline (condensed)
| Date | Patch | Note |
|---|---|---|
| May 22, 2024 | Launch | v1.0, followed by hotfix waves (v1.0e–g) |
| Sep 23, 2024 | v1.2 | "Voyager" era fixes and content |
| May 29, 2025 | — | Mysterious Update trailer: "coming July" |
| Jul 30, 2025 | Mysterious Update | Out now — the post-game layer arrives |
| Aug 8, 2025 | v2.2 | Update follow-up |
| Aug 14–21, 2025 | v2.3 → v2.3c | Pyramidion clue fix (v2.3a) + bug fixes |
| Aug 27, 2025 | v2.3d | Frozen Spire meta puzzle rework |
| Aug 30, 2025 | v2.3e | New visual cues |
| Sep 4–9, 2025 | v2.4 → v2.4a | Polish, accessibility, fixes |
| Sep 25, 2025 | v2.5 | Feature pass |
| Oct–Dec 2025 | v2.5a → v2.5e | Fix waves (options lag, minor changes) |
| Jun 24–25, 2026 | v2.6 + hotfixes | June update |
| Jul 4, 2026 | v2.6a | "Late Game Changes" — current patch |
FAQ
Is it free? Yes — a free update to the base game.
Can I start it before finishing the story? The circlet can be reached early if you are bold, but the hunt itself gates on 110 stars, and its puzzles assume all four upgrades and six runes. Story first; layer after.
Did it change 100%? It extended it: 109 stars became 120, and the completion bar now includes pyramidions, meteorites and the wall layer (100% guide).
Does the game still get updates? The patch cadence through 2024–2026 has been steady (see the timeline), and the developer's secret-room message teased content "until the ??? update" — which the community reads as this one paying off. Pages here are verified against v2.6a; when a new patch lands, affected pages get bumped.
