Hidden Games - Professor Leonardo's Journey Through Time
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A package left outside the workshop, twenty-four sealed envelopes and a time machine waiting for no one.
One-time experience
The 24 envelopes must be opened and the materials are used up during the adventure: once the puzzles are solved, the game cannot be replayed. It is designed to be experienced once — and then possibly passed on to someone else who hasn't done it yet.
What it is about
Twenty-four envelopes, a time machine, a secret kept for centuries
Professor Leonardo's Time Travel is a puzzle game from the Hidden Games series, published in Italian by MS Edizioni. A mysterious package is delivered to the professor's workshop, and that's where it all begins: your task is to open and decipher the contents of the 24 mysterious envelopes.
Each envelope contains a puzzle whose solution reveals which one to open next. The clues lead you through different eras thanks to the professor's time machine, and at each stage, the riddles, logical challenges, and historical setting change. Along the way, you'll need to retrieve the keys necessary to open an ancient mystical portal.
The smartest thing about Professor Leonardo's Time Travel is that you decide the pace: you can tackle the entire adventure in a single session, or open one envelope a day and make it last twenty-four days, like an Advent calendar. For 1 to 6 players, aged 14 and up.
It's not a board game with a rule book: it's a chain of twenty-four envelopes, where each solution is the key to the next.
The secret of this game in one line
Opening one envelope a day is the true mode: it stays in your head all afternoon, and the next evening someone asks you "so, did you figure it out?".
From the gaming experience
Professor Leonardo's Time Travel
The puzzles are the same ones you would face in a group: solo, the experience remains complete, you only lose the pleasure of discussing hypotheses aloud with someone. On the other hand, you go at your own pace and no one spoils the solution for you.
FrogScore · FroGames editorial rating · based on rules and play sessionsWhat you have before you
Four things and no manual
There's no rulebook to study. There's a package, and everything you need is inside.
24 mysterious envelopes
Sealed, to be opened one at a time. Inside each is a puzzle and the materials to solve it: the solution tells you which envelope comes next.
The time machine
The means that takes you from era to era. At each stage, the historical setting, riddles, and type of logical challenge change.
The keys and the portal
During the journey, you retrieve the keys needed to open an ancient mystical portal. Behind it lies a secret kept for centuries.
Two possible rhythms
All at once in a long session, or one envelope a day for twenty-four days. The choice completely changes the experience.
There are twenty-four sealed envelopes on the table and no one knows what's inside the next one. From that moment on, that's all anyone talks about.
An adventure in five moments
What happens at the table
Not the rules. The experience. And no spoilers.
The package outside the workshop
We open the box and find twenty-four sealed envelopes, all different. No rules to read, no setup: just the first envelope and the clear feeling that we are about to open something that doesn't concern us.
The first solved enigma
It takes us ten minutes to figure out what we need to look at, then the solution comes all at once — and it tells us which envelope to open next. That little click is why this game exists.
The era changes, the game changes
The time machine moves us and with it everything changes: setting, type of puzzle, what we need to look for. What we had learned in the previous envelope is now only half useful.
The envelope that blocks everyone
Sooner or later one arrives that won't unlock. You turn the paper in all directions, accuse the professor of being unfair, go to sleep. The next morning someone wakes up and says "I got it" — and had the answer in front of them for an hour.
The last envelope
All the keys are there and only the portal remains. The last envelope is opened with that deliberate slowness of someone who doesn't want it to end. Then the secret comes out — and on the table remain twenty-four empty envelopes and a story to tell.
How to play
The adventure flow
Four steps and no manual to study. You start within a minute of opening the box.
A mysterious package has been delivered to Professor Leonardo's workshop. Inside you will find 24 mysterious sealed envelopes and the materials to tackle them.
Each envelope contains an enigma. Solving it reveals which is the next envelope to open: the chain builds itself, without the need for rules.
The clues lead you through different eras thanks to the time machine. Each stage offers new puzzles, logical challenges, and historical settings.
Along the journey you retrieve the keys needed to open an ancient mystical portal and discover the secret guarded for centuries. End of the adventure.
Why it works
Six reasons to open the package
Each envelope opens the next
There's no board or turn order: the structure is the chain itself. Solving an enigma physically tells you which envelope to pick up next.
All at once or 24 days
The same box can be a long evening or a daily Advent calendar-style ritual. Few gaming experiences let you choose the pace like this.
Eras that change the rules
Each historical stage brings different puzzles. You never get used to one type of enigma, because the context changes under your feet with each time jump.
It really works alone
From 1 to 6 players, without separate modes or automatons to manage: the enigmas are identical. Solo, you go at your own pace and no one gets ahead of you.
Zero rules to learn
No manual, no setup, no explanation to participants. You open an envelope and begin: perfect for those who always say no to board games.
A gift that lasts a month
Twenty-four envelopes to open one a day is a gift idea that is enjoyed for weeks instead of just one evening. It's also valid for those who never play games.
How it ends
A portal, and no return game
You don't win against anyone: you reach the end or you stop. Here's what to really expect from this box, said before buying it.
The goal
- Decipher all 24 envelopes following the chain of clues
- Retrieve the keys to open the ancient mystical portal
- Discover the secret guarded for centuries and close the story
Things to know beforehand
- It's a one-time experience: envelopes and materials are consumed during play
- Those who know the solutions cannot replay it — at most they can let others experience it
- Recommended age is 14+: some puzzles require patience, not just intuition
Professor Leonardo's Journey Through Time is not meant to be kept on the shelf to be replayed: it is lived once, with the right people, and the memory of that envelope that blocked you for an entire hour remains.
Frequently Asked Questions
FAQ about Professor Leonardo's Journey Through Time
It's a one-time play: is it worth it?
It depends on what you're looking for. It's a single-use experience, like a live escape room or a novel: what stays with you is having experienced it, not being able to repeat it. In return, you get 24 different puzzles, an adventure that can last 24 days, and zero time spent learning rules. If you're looking for a game to replay for years, this isn't the right box — and we prefer to tell you that upfront.
Do you need historical knowledge to solve the puzzles?
No: the eras are the narrative framework of the journey, not exam material. The puzzles are tackled with observation, logic, and attention to the materials you find in the envelopes. It's not a general knowledge quiz; it's a puzzle game set in time.
Can it be played solo?
Yes, the challenge is designed for both groups of friends and single players: the stated range is 1-6 players. The puzzles don't change in solo play, and the experience remains complete; what you lose is the vocal discussion, which with two or three people is half the fun.
How long does it really last?
Each envelope takes approximately 5-15 minutes, so the complete adventure spans several hours. You can tackle it in a single long session or open one envelope a day and prolong the suspense for 24 days: it's the same box, but they are two different experiences.
Is it in Italian?
Yes, it's the Italian edition published by MS Edizioni: envelopes, materials, and texts are in Italian. Since it's a game made of letters and documents to read, language matters a lot here.
What's the difference between this and Professor Leonardo's Around the World?
They belong to the same Hidden Games series and share the format — 24 envelopes to open one at a time, 1-6 players, 14+ — but they are two distinct adventures, with their own puzzles and stories. In Around the World, you follow the stages of an expedition around the planet; here you travel through different eras with the time machine. Each is complete in itself.
Hidden Games – Professor Leonardo's Journey Through Time is an escape room-style puzzle game for 1-6 players (age 14+, approximately 5-15 minutes per envelope), Italian edition published by MS Edizioni as part of the Hidden Games series. A mysterious package delivered to the professor's workshop kicks off a narrative adventure to decipher through 24 mysterious sealed envelopes: each envelope contains an enigma whose solution reveals the next to open. Clues lead through different historical eras thanks to the time machine, until the keys that open an ancient mystical portal are retrieved. It can be played all at once or one envelope a day, like an Advent calendar, alone or with company. A one-time experience, suitable for family evenings, groups of friends, and solo players. Available on FroGames.it.
Hidden Games - Professor Leonardo's Journey Through Time
Frequently Asked Questions
The answers you're looking for, no beating around the bush.
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We always strive to provide the correct content, but minor variations are possible due to reprints or updates. The information comes directly from the publishers. If you have any questions, please contact us!
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