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.
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
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.
All-Access
Every wing, the grounds, and the finale — the whole manor, one price. Saves $1.98 versus buying all three areas separately.
West Wing
The Portrait Gallery and the Cellar.
North Wing
The Conservatory.
The Grounds
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.
What is Yesterlight?
Yesterlight is a time-travel puzzle game and Myst-like manor mystery from Adelyons Software LLC. You explore the rooms of Fennick Hall with a brass chronoscope that scrubs each room across four eras — Founding, Height, Decline, and Now — and every change you make in the past ripples forward through later eras.
It is a point-and-click adventure with no combat, no timers, and no twitch: the puzzles ask you to think across time rather than react. The game is single-player and fully offline, with no account, no ads, and no data leaving your phone.
Frequently asked questions
How does Yesterlight's chronoscope era slider work?
A brass slider scrubs the current room between its four eras with a continuous morph rather than a fade, so decades read as things physically moving through the room. Causality runs forward only: oil a stiff lock in the Founding and it stands open in every later era, and an object you take in the past is gone from the present.
Is Yesterlight a horror game?
No. Despite the ruined manor, Yesterlight is a wistful, non-violent mystery of entropy and memory. There are no jump-scares and no violence — the antagonist is time itself.
How much does Yesterlight cost?
The entire East Wing is free forever. The rest of the manor is sold one area at a time: the West Wing, the North Wing, and The Grounds are $3.99 each, or $9.99 for the All-Access bundle, which saves $1.98 versus buying all three areas separately. Every purchase is one-time, never a subscription, and there is no free trial because the free East Wing is the trial.
Does Yesterlight work offline?
Yes. Yesterlight is 100% offline — every room, era, puzzle, and hint runs on-device, and there is no network requirement to play. It plays on a plane, in a tunnel, or anywhere without a signal.
Does Yesterlight require an account or collect my data?
No. There is no account, no login, no cloud, no server, no analytics, and no ads. Your event log, inventory, recovered journal pages, and settings are stored only in a small local file on your phone. The one exception is purchase data, handled by Apple, Google, and RevenueCat solely to validate and restore optional one-time purchases; they never receive your gameplay.
Does Yesterlight use AI to generate its hints?
No. The owner's-marginalia hint system is deterministic, rule-based logic that runs entirely on your device and inspects your local event log for near-misses. There is no language model, no AI model, and no model download anywhere in the game, and hints need no network connection and no API key.
How long does Yesterlight take to play?
The free East Wing is around an hour of play and includes all four eras, the full era-slider mechanic, and its journal page. The rest of the manor is paced the same way — point-and-click and thoughtful rather than fast, with no combat and no timers.
Who is Yesterlight for?
It is made for Myst-like fans who want slow, atmospheric point-and-click exploration, for time-travel puzzlers who want a real forward-only causality system, and for offline players who want no account, no ads, and a full free chapter before deciding whether to pay.
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.