Reference
What nobody has announced
Puzzle count, play time, achievement list, Xbox version, Deck rating and the four unnamed characters are all unpublished. Each has a check you can run.
Every guide site has a list of things it does not know. Most keep it private. This one is public, with a way to check each item yourself, because a site that pretends to know the puzzle count in November is a site you should not trust in December.
Ten open questions
| Question | Status | How to check |
|---|---|---|
| How many puzzles? | "The most in the series" - no number published | Watch the store page and official TOPICS for a count |
| How long is the game? | No figure from LEVEL5 | Wait for reviews; play-time claims before release are guesses |
| How many achievements? | Steam carries the category; no list published | Open the Steam achievements page after launch |
| Is there an Xbox version? | Not announced | Check layton.jp's product page platform row |
| Is Traditional Chinese fully voiced? | Steam's field says no asterisk, so no full audio | Re-read the supported_languages block on Steam |
| Steam Deck rating? | Unrated (resolved_category 0) | Query Valve's compatibility endpoint for app 3384600 |
| How does cross-save work? | Referenced in bonus terms; no mechanics published | Look for a launch-week support page |
| Is there a public demo? | No; TGS build was show-floor only | Check the Steam page for a demo button |
| Does the Switch version get a next-gen upgrade? | No, per LEVEL5's own notice | Read the Switch notice on the product page |
| What are the four unnamed characters called? | Four have no romanised name on the official page | Check the English site after launch |
Three reasons for the gaps
Three different reasons, and they are worth separating.
Not decided, or not published yet. Puzzle count, play time, achievement list. LEVEL5 tends to release these close to launch or let players discover them. Nothing is being hidden; the material simply is not out.
Deliberately out of scope. The official page documents this game, not the platform ecosystem. Steam Deck ratings come from Valve, not from the publisher, which is why the store description can mention touchscreen controls while the compatibility API says nothing.
Pending on the platform holder. The Switch version's lack of an upgrade path is LEVEL5's decision and is documented; the Deck rating is Valve's process and is not.
The December check
The achievement list. Completionists care because the list is the difference between a 20-hour game and a 60-hour one, and it is the easiest thing to verify on launch day: the Steam community stats page for app 3384600 will populate with names and global percentages as soon as the game unlocks.
The list goes up here when it exists, taken from that page with the percentages attached.
Scope of this page
Not a promise that everything else on the site is certain. Every factual page carries a checked date and names its source; where two official sources disagree, both are shown rather than resolved. The release date page is the clearest example - two official dates, one day apart, both printed.
Found something here that an official page disproves? The contact address at the bottom of every page reaches the person who wrote it.