A Time-Travel Puzzle Game & Myst-Like Manor Mystery

Yesterlight is a wistful time-travel puzzle game and manor mystery set inside one crumbling house. A brass chronoscope lets you scrub each room across four eras of its history — Founding, Height, Decline, and Now — and anything you change in the past ripples forward through every younger era. It is a Myst-like point-and-click adventure: no combat, no timers, no twitch — just a haunted-but-not-frightening house and puzzles that ask you to think across time. Fennick Hall has been built, flooded, burned, and abandoned; its last owner built the scope to find the hour the family's luck turned, then vanished, leaving the device still warm. Play the whole East Wing free, offline, with no account.

What it is:

A brass chronoscope era slider that scrubs each room across four eras, morphing decades physically through the room
Forward-only causality — oil a lock in the Founding and it stands open in every later era; take an object in the past and it is gone from the present
The Chronoscope Journal — recovered story pages plus a plain cause and effect chain of everything you have rewritten
Between-era superpositions that two late puzzles turn into their answer
Owner's-marginalia hints in the dead owner's own voice — rule-based, fully on-device, never generated
100% offline — no account, no cloud, no analytics, no ads; your save never leaves the phone

Coming soon to the App Store & Google Play.

Yesterlight gameplay — the Owner's Study scrubbed back to the Founding: warm candlelight, a fresh brass lock, and the Oil the study lock action offered, so the fix ripples forward through every later era

How It Works

🕰️ The Chronoscope Era Slider

A persistent brass slider scrubs the current room between its four eras with a continuous morph — furniture rises and sinks, light shifts from candle amber to cold ruin sky, and decades read as things physically moving through the room, not a fade. Rest it between two eras for a superposition two puzzles depend on.

⏳ Forward-Only Causality

Change the past and watch it ripple forward. Oil a stiff lock in the Founding and it stands open in every later era. Take the candlestick in the Height and it — and the scorch mark it would have made — are gone from the Decline and the Now. The one hard rule: the fire is fixed, and the finale reveals why.

🧩 Puzzles Across Time

Drop a key in a sapling's planter in the Founding and cut it out of the grown oak in the Now. Move a strongbox to the one closet that survives both the fire and the flood. Overlay two half-inscriptions that only complete in the space between two eras. Point-and-click, thoughtful, and finishable in an evening.

📖 The Chronoscope Journal

Every change you make is auto-logged as a plain cause and effect chain — “you oiled the lock → it opens in three eras” — read straight off the world's event log. Recover a page of the owner's journal at the end of each wing to unspool the story of Fennick Hall.

🕯️ Owner's-Marginalia Hints

Stuck? The dead owner answers in her own voice — oblique first (“I too kept trying to fix it after it broke”), concrete only after you have been stuck a while. The hint engine is rule-based and fully on-device — no LLM, no network, always the same for the same board.

🔒 Private & Offline

No account, no login, no cloud, no analytics, no ads. Your save is a tiny local file on your phone — there is no server to leak it. The whole manor plays offline, and nothing you do ever leaves the device.

A Look Inside

Yesterlight gameplay — the Portrait Gallery held between the Height and Decline eras, both half-present in a between-era superposition, with the Read the overlaid inscription action available — Between two eras — read the overlaid inscription

Yesterlight title screen — Fennick Hall, with a brass chronoscope mark and a prompt to scrub each room through four eras — Fennick Hall — the chronoscope is still warm

Yesterlight Chronoscope Journal showing a recovered story page and the cause and effect chain of changes rippling forward through the eras — The Chronoscope Journal — cause & effect

Yesterlight wing map of Fennick Hall — the free East Wing plus the unlockable West and North wings and the grounds — The wing map — one manor, four chapters

Yesterlight's unlock screen — one-time area purchases at $3.99 each and a $9.99 All-Access bundle, never a subscription, with the East Wing staying free — One-time purchases — honest, optional pricing

Made for Mystery Lovers

🗝️ The Myst-Like Fan

Slow, atmospheric point-and-click exploration — no combat or timers
A single hand-built house to read like a book, room by room
Puzzles that reward noticing, not reflexes

⏱️ The Time-Travel Puzzler

A signature era slider with real forward-only causality
Between-era superpositions two late puzzles turn into their answer
A cause-and-effect journal that shows how the past reached the present

🔌 The Offline Player

100% offline — plays on a plane, in a tunnel, anywhere
No account, no ads, no data leaves the phone
A full free chapter before you ever consider paying

Unlock Yesterlight

The entire East Wing is free forever — around an hour of play, all four eras, the full era-slider mechanic, and its journal page. Buy the rest of the manor one area at a time, or take the All-Access bundle and save. Every purchase is one-time — never a subscription — and any purchase also unlocks the owner's concrete-hint tier. The East Wing stays free, forever.

Best value · one-time purchase

All-Access

$9.99 once

Every wing, the grounds, and the finale — the whole manor, one price. Saves $1.98 versus buying all three areas separately.

West Wing

$3.99 once

The Portrait Gallery and the Cellar.

North Wing

$3.99 once

The Conservatory.

The Grounds

$3.99 once

The garden, and what the fire left behind.

Prices may vary by region and are shown in the app at the time of purchase. Every product is a non-consumable one-time purchase — there is no subscription, no auto-renewal, and no free trial, because the free East Wing is the trial. Owning all three areas grants exactly what the All-Access bundle grants, including the finale; the bundle is a discount, never the only path to the ending. Purchases restore on a new device with Restore Purchases. See our Terms and EULA for full purchase details.

Privacy First — Your Save Stays on the Phone

Yesterlight is built local-first. Here's exactly how it works:

No account, no cloud, no server. You don't sign up or log in. There is no backend that receives your progress — nothing to leak and nothing to fail on an update or a new phone.
Your save never leaves the device. Your event log, inventory, recovered pages, and settings are stored only in a small local file on your phone.
The game is fully offline. Every room, era, puzzle, and hint runs on-device. There is no network requirement to play.
Hints are deterministic and on-device. The owner's-marginalia hint engine is rule-based logic — there is no language model, no AI model, and no model download, and it needs no network or key.
One billing helper. The only data that ever leaves your phone is purchase data, handled by Apple, Google, and RevenueCat to validate and restore your optional one-time purchases. They never receive your gameplay.

For complete details, see our Privacy Policy, Terms of Service, and EULA.