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Quern - Undying Thoughts
game
•7/25/2026

Quern - Undying Thoughts

byZadbox Entertainment
Steam
8.4
The Verdict
"Quern - Undying Thoughts is what happens when a small studio picks one hard idea and refuses to compromise it. The reusable-mechanic design is the real accomplishment — it turns a collection of puzzles into an argument about how a place works, and it makes the solutions feel discovered rather than dispensed. Twenty hours in, when a symbol from the first act finally resolves against a device in the last, you get the sensation this genre exists to produce, and almost never delivers at this consistency." "It is not a polished product. The backtracking is a design debt Zadbox never paid down, the opening squanders its first impression, and a few endgame puzzles are unfair in the specific way that sends good players to a wiki and sours the ending. Those are legitimate deductions, and the 83 on Metacritic looks about right for exactly those reasons." "But the ambition here vastly outruns the budget, and ambition is the scarcer commodity. Zadbox understood that Myst's successor problem was never about vistas or FMV or lore — it was about building a world whose parts know about each other. They built it. Nine years on, very few have." "Buy it. Bring a notebook. Don't look anything up until you've genuinely earned the right to."

Gallery

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Key Features

Reusable puzzle mechanics: Items and devices don't get consumed by a single lock. A tool solved into existence in the first act returns in the third with a new function. The island is one machine, not fifty vending slots.
Roughly fifty locked doors and mechanisms: Hand-crafted, non-procedural, and layered — many gate progress in more than one direction, so the island opens like a lattice rather than a hallway.
Zero-pressure design: No combat, no timers, no death, no inventory scarcity. The only resource is your attention.
Environmental narrative: Story arrives through letters from a prior arrival and conversations with a hermit — no cutscene dumps, no exposition NPC standing in a doorway.
Original orchestral score: Atmospheric rather than decorative, and it knows when to shut up.
Secret areas: Optional content for players who map compulsively, gated behind observation rather than grinding.

The Good

Reusable puzzle mechanics make the island feel like one coherent system
Genuinely earned "aha" moments, unassisted by hints or nudges
Strong art direction and a restrained, excellent orchestral score
15–25 hours of dense content at an indie price
No combat, timers, or death — experimentation costs nothing

The Bad

Heavy backtracking; verifying an idea often means crossing the map again
A few late-game puzzles demand a leap of intent, not logic
Slow, unstructured opening that gives newcomers nothing to hold onto
In-game note-taking is too thin for a game this documentation-heavy
No hint system at all; the walkthrough is the difficulty setting

In-Depth Review

Bottom Line: Zadbox Entertainment built a puzzle island that actually thinks like an island — interconnected, reusable, stubbornly coherent — and in doing so made the most convincing heir to Riven in two decades. The backtracking will test your patience, and a handful of late-game puzzles cross from clever into cryptic, but the payoff is the real thing.

The Gameplay Loop

The loop is deceptively plain: explore, observe, note, experiment, unlock, repeat. What makes Quern work is what it does to the note step.

Most puzzle adventures treat notes as a memory aid. Quern treats them as the actual gameplay. You will see a wall of symbols in hour two that means nothing, and in hour eleven you'll be standing somewhere else entirely when it snaps into place. The game does not flag that moment. It does not ping you. It simply trusts that you wrote it down. That trust is the whole design thesis, and it is either the best thing about the game or an immediate dealbreaker depending on who you are.

The reusable mechanics deserve the attention they get. Here's why they matter beyond the marketing bullet: in a conventional adventure, acquiring an item collapses the solution space. You get the crowbar, you look for the crowbar-shaped problem, you're done. Quern keeps its objects live. A device that opened a door can later be repurposed as a measuring instrument, a power source, a lens. The consequence is that you're never fully "done" with anything, which means you're never fully done thinking about anything. Solution space stays open. That's harder to author than it sounds — every new use has to be discoverable without a tutorial and defensible in hindsight — and Zadbox mostly pulls it off.

Mostly. The late game is where the seams show. A handful of puzzles in the final stretch tip from "elegantly obscure" into "the designer knew something you didn't." The specific failure mode is a leap of intent — you understand every component of the mechanism and still can't guess what the game wants you to want. It's not frequent, but it's frequent enough that a meaningful slice of players will hit a wall and reach for a walkthrough, which retroactively deflates the twenty hours of honest deduction that preceded it. That's the tax on this design philosophy, and Quern pays it.

Friction and Pacing

The backtracking is real. This is the single most consistent complaint in user reviews and it is not player impatience — it's a genuine cost of the interconnected structure. When every solution can live anywhere, verifying a hypothesis means walking. A lot. Navigation is reasonably brisk and the island is legible enough that you won't get lost, but you will absolutely cross it for the fifteenth time carrying one new piece of information, and there are stretches where the ratio of travel to thinking tilts the wrong way. A fast-travel system would have compromised the sense of place; its absence compromises the sense of momentum. Zadbox chose place. Defensible, but not free.

Pacing is the other honest caveat. The opening hours are slow by any modern standard — deliberately, but slowly. There's no onboarding ramp, no early gimme puzzle to establish confidence, no difficulty curve in the conventional sense. Newcomers to the genre routinely describe the first two hours as aimless, because Quern refuses to distinguish between "wandering" and "playing." Veterans read that same stretch as the game respecting them. Both readings are correct.

The Absence of Failure

Stripping out death and timers isn't laziness; it's a load-bearing choice. Because nothing can go wrong, experimentation costs nothing but time, which means the game can ask you to fiddle with a mechanism for ten minutes without punishing curiosity. It also means Quern has exactly one lever for tension: comprehension. The only threat is not understanding. For a puzzle game, that's the correct threat — and it explains why the atmosphere reads as contemplative rather than inert.

Editorial Disclaimer

The reviews and scores on this site are based on our editorial team's independent analysis and personal opinions. While we strive for objectivity, gaming experiences can be subjective. We are not compensated by developers for these scores.