Reviewed · NANTES
Discover Nantes while playing! Escape game – The alchemist
Nantes becomes your game board in L’Alchimiste, a private, app-led mystery that sends you through the city to question witnesses, solve puzzles, and decide the fate of Josyne, a villager accused of witchcraft. The story gives a simple walk through central Nantes a bit of purpose, especially for families and friends who enjoy solving clues together.
I like the low group price, $23.22 for up to six people, and the freedom to play at almost any hour. I also like that you use your own smartphone and set your own pace, with no guide or shared group to keep up with. The main concern is content: some puzzles may feel thin, and one important stop can be disappointing if the cathedral is closed.
Key points to know
- A witchcraft mystery in central Nantes: You play an alchemist investigating the accusation against Josyne.
- A two-hour walking game: The app guides you between points of interest, with puzzles and missions along the way.
- Private for up to six people: Your group plays alone, so you can discuss answers without strangers.
- Start and finish at Place Marc Elder: The route returns you to the same meeting point.
- Your phone is the key equipment: You need a smartphone to access the Coddy application and play.
- A flexible schedule: You can begin any time from midnight through 11:30 p.m., subject to the activity’s stated availability.
Turning Nantes into a mystery

The clever idea here is simple: instead of looking at Nantes as a list of sights, you use the city as evidence. The streets, landmarks, and people in the story become part of a case. You are not just walking from one attraction to another. You are trying to work out why Josyne has been accused and what the witnesses reveal.
You play an alchemist, a fitting role for a story about suspicion, strange claims, and the search for truth. At each point, the Coddy app presents a puzzle or mission. Your team works out the answer, then moves on to the next part of the story.
The central choice gives the game a little more weight than a standard sightseeing quiz. You eventually decide if you will defend Josyne or support the witchcraft accusation. Do not expect a serious historical investigation. This is a light fictional adventure built around Nantes landmarks, but the choice helps keep the group involved.
I would think of the experience as a walking puzzle game first and a city tour second. If you want detailed commentary on architecture, history, and local life, this is not the right format. If you like having a reason to look closely at your surroundings, it may give your walk more energy.
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Starting at Place Marc Elder

The activity begins at Place Marc Elder in central Nantes and ends back there. This fixed start and finish makes the outing easy to fit into a day. You do not need to arrange a taxi from a distant endpoint or work out where to meet at the end.
The meeting point also places the activity near well-known parts of central Nantes. The exact route is controlled through the app, so you should follow the prompts rather than expect a printed map or a guide waiting in the square.
Before you start, download the Coddy application and make sure your phone is charged. This is an important practical step. One participant needed help because it was not clear at first that Coddy had to be downloaded, but customer support responded quickly and explained the process. I would avoid leaving the download until the last minute, especially if your mobile data or app store access is limited.
Because the activity is private, the people in your group set the tone. Six people is the maximum, which is a good size for sharing ideas without turning every clue into a committee meeting. A smaller group may move faster, while a full group can offer more opinions when a puzzle proves stubborn.
Following the alchemist’s case

The first part of the game introduces the accusation against Josyne and gives your team its role. From there, the application leads you to various points in Nantes. You meet the story through witnesses, with each encounter presenting puzzles and sometimes a mission to complete.
That format gives you a clear reason to keep moving. A regular city walk can lose momentum when children or less enthusiastic companions ask how much farther you have to go. Here, the next location contains another piece of the case.
The quality of the experience depends heavily on how much you enjoy the puzzles. The game has received praise for making the questions playful and giving a group a fun way to see the city. That is its best use. You can pause to discuss an answer, take in the nearby surroundings, and then continue when your team is ready.
The app-led structure also means you do not have a guide adjusting the difficulty for you. A human guide might offer a hint, explain a landmark, or reshape the activity around your interests. Here, the application provides the framework, and your group must supply the conversation and problem-solving.
Reaching Nantes Castle
The château is one of the named sights included along the route. Its presence gives the game a strong visual anchor and connects the fictional investigation with one of Nantes’s most recognizable places.
You should not expect a full castle visit as part of the activity. The available details describe an outdoor urban game, not an admission-based tour of the interior. The castle functions as one of the city locations where the story and puzzles unfold.
That distinction matters. If you want to spend time inside the château, read displays, or follow a formal explanation of its past, plan that separately. The escape game may bring you to the area, but its purpose is to present a clue, question, or mission rather than provide an in-depth visit.
Still, this kind of stop can work well for a mixed group. One person may be interested in the building, another in the puzzle, and a child may simply enjoy having a task to complete. The game gives everyone a reason to pause and look around, even if the historical information in the app is brief.
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The cathedral stop and the main weakness

The cathedral is another route landmark, and it is also where you should keep expectations in check. A puzzle connected with the cathedral can be affected by access. If the building is closed, the setting may not work as intended, and you could find yourself trying to solve a clue without the full place available to you.
That is not a minor detail if the cathedral is one of the only major stops you were hoping to explore. One participant found the closed cathedral especially frustrating and felt that the explanations at the sites were too short. This points to the activity’s clearest weakness: the experience may use famous sights without giving you much background about them.
I would treat the cathedral and castle as scenery and puzzle locations, not as substitutes for proper sightseeing. Check opening conditions if entering the cathedral matters to you, but keep in mind that this is an app-based activity with flexible start times, not a scheduled guided visit. The game may still be playable when a site is closed, but the stop may feel less satisfying.
How the puzzles work in practice

The exact puzzle sequence is not provided in advance, which is part of the fun. You know the broad structure: witnesses, questions, puzzles, and missions. Your task is to connect their information and decide what to believe.
The questions are designed to be playful rather than academic. That makes the activity a good choice for a family or friend group with mixed interests. You do not need everyone to be a history expert. One person may notice a visual detail, another may read the wording carefully, and someone else may keep the group moving.
At the same time, puzzle quality can feel subjective. A group that enjoys phone-based challenges may find the clues entertaining. A group expecting clever, demanding escape-room puzzles could find them too simple or not sufficiently connected to the sights.
I would allow the full two hours rather than trying to rush. The stated duration is approximately two hours, and the route is meant to be completed on foot. Your group may finish sooner if it moves quickly, but the time also covers pauses for discussion and city viewing.
If you get stuck, slow down and reread the prompt before guessing. The story depends on clues from several witnesses, so the answer may not be obvious from one screen alone. The private format lets you take a short pause without worrying about holding up another group.
What the $23.22 price really buys

At $23.22 per group of up to six, the price is modest when split among several people. A full group pays only a few dollars per person for about two hours of entertainment. That is a fair deal if you want an activity that combines a city walk with a shared challenge.
The value drops if only one or two people are playing and neither enjoys app-based puzzles. You are paying for the game structure, not entry to the castle or cathedral, and not for a live guide. You also need to bring your own smartphone and handle the application setup.
This price makes the experience particularly useful as a flexible add-on to a Nantes visit. It can fill a free part of the day without the cost or fixed schedule of a traditional tour. You can play with family, friends, or another private group, and you do not have to share the activity with strangers.
The published score is 3.4 out of 5 from five ratings, so I would book with sensible expectations. The strongest case for it is a light, social way to explore. The weakest case is expecting a polished historical tour with detailed explanations at every stop.
Timing, access, and group comfort

The activity is listed as available Monday through Sunday from midnight to 11:30 p.m., with two hours of play. That unusually wide window gives you plenty of flexibility. You can fit it around meals, museum visits, or other plans rather than building your day around a guide’s departure time.
The midnight start listed in the schedule should be read as a very broad availability window, not a recommendation that you play at midnight. Daylight will make it easier to see the city and locate points connected with the puzzles. The app may let you begin late, but practical visibility and comfort still matter.
The route begins and ends at Place Marc Elder. The activity is near public transportation, which makes the meeting point easier to reach. Service animals are allowed, and most people can participate, but remember that this is a walking game through city streets.
The private format is useful for families because you can stop briefly, talk through a clue, or adjust your pace. It also suits friends who like friendly competition. You should be comfortable using a phone while walking and paying attention to the app’s directions.
Who should play L’Alchimiste?

I would recommend this for:
- Families wanting a structured way to explore Nantes together
- Friends who enjoy puzzles, riddles, and light role-playing
- Visitors who prefer a private activity over a shared tour
- Groups of up to six looking for an inexpensive two-hour outing
- People with a flexible schedule who do not want a fixed departure time
I would be more cautious if you want detailed local history, a live guide, or a serious escape-room challenge. The story may also disappoint you if the main goal is to visit the interiors of Nantes landmarks.
The activity works best when you accept its limits. Bring curiosity, a charged phone, and a willingness to discuss silly answers before finding the right one. Do not book it as your only introduction to Nantes. Use it as a playful layer on top of your own sightseeing.
Should you book this Nantes escape game?
Book L’Alchimiste if you want a low-cost, private walking activity that turns central Nantes into a fictional witchcraft case. The app-led format is flexible, the group size is generous, and the game gives families and friends a shared goal.
Skip it if you need substantial explanations at each monument or expect every puzzle to feel like a professional escape room. The closed cathedral issue and limited site information are real considerations.
For the best fit, download Coddy before arriving, charge your phone, and plan the game during daylight. If you can accept a light story and playful questions, $23.22 for up to six is a reasonable way to spend two hours in Nantes. Free cancellation is available when you cancel at least 24 hours before the start time, giving you some protection if your plans change.
FAQ
Where does the Nantes escape game start?
It starts at Place Marc Elder, Place Marc Elder, 44000 Nantes, France.
Where does the activity finish?
The activity finishes back at the starting meeting point.
How long does the game take?
The approximate duration is two hours.
How many people can join one booking?
One private group of up to six people can participate.
Is this a shared tour?
No. It is a private activity, so only your group takes part.
What equipment do I need?
You need a smartphone to take part in the game through the mobile application.
Which application is used?
The game uses the Coddy application. Download it before starting.
What is the story about?
You play an alchemist investigating Josyne, a villager accused of witchcraft. You solve puzzles from different witnesses and decide if you will defend her or support the accusation.
When can I play?
The activity is listed as available every day from 12:00 a.m. to 11:30 p.m. You have a two-hour experience once you begin.
Can I cancel for a full refund?
Yes. You can receive a full refund if you cancel at least 24 hours before the experience start time. Cancellations or changes within 24 hours are not accepted for a refund.
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