Marie Curie's Secret Weapon X

Paris Outdoor Escape Game


In this self-guided treasure hunt game, you will pass by must-see attractions and less-known corners of Paris while solving a real historical mystery. It’s the outbreak of WWI. As soldiers take taxis to the battlefield, you have a special mission: follow the clues left by Marie Curie and solve escape-room-like puzzles to uncover her Secret Weapon. Do you have what it takes?

Available in English and French. 

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What is it?

Mystery City Games are a mix between a scavenger hunt,  escape room, and a self-guided walking tour. It’s a bit like the Da Vinci Code or National Treasure – players use magical objects and clues hidden in the architecture of the city to solve a mystery. You can play competitively, but you can also relax and go your own pace, enjoying shops or cafés along the way. It’s an adventure through Paris like no other and should definitely be included in your ‘top 10 things to do in Paris’! This is not an app-based game – we think treasure hunts are more fun with real treasure maps, old books, and beautiful game pieces. 

The Story:

WWI has just broken out. As soldiers are leaving Paris in taxis headed to the battlefield, you have a special mission: find the secret weapon left behind by France’s most famous scientist, Marie Curie. Do you have what it takes? Explore the city and solve puzzles in this outdoor escape game to find out!

How It Works:

  • You will meet the Game Master  to pick up a backpack containing all of the materials that you need to play: treasure maps, boxes, and beautiful tools
  • Follow an ancient treasure map as you walk through Paris city center discovering must-see city sites and monuments
  • Solve puzzles while exploring Paris‘ top attractions and having fun with your friends or family on a holiday, bachelorette party, or weekend out. If you only have one day in Paris, this is the way to see it!
  • Learn true stories from the city’s history


For whom?
Are you a curious and adventurous spirit? Are you looking for fun things to do in Paris? Then Paris‘ best scavenger hunt is something for you!  They are a great idea for a family visit to Paris, a date with someone special, a birthday party, or an event with your team.

Can my kids play?

The games were made for adults, but are a very fun thing to do with kids or teenagers too. Kids ages 6 and older can play when accompanied by an adult. 

Why should we play?

The game is the most fun thing to do in Paris! Whether you only have a day to visit or you have been living in the city for years, you are sure to discover something new. Based on an amazing real story of one of the world’s most famous scientists, this game will take you past top sites and have you laughing with your friends as you race to solve the mystery. Along the way, you will learn real stories and explore secret places hidden in the city of light!

Where is it?

The game starts and ends in the Marais neighborhood. The route covers 3 km and passes by five key sites in the city: Hotel de Ville, Châtelet, Tour de l’Horloge, Eglise St Merri, and Tour St Jacques.

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