HiddenCity presents

An immersive game
across London

Solve a trail of clues on an
into the world of
a criminal mastermind

Professor James Moriarty invites you to celebrate the finest minds of London by solving his challenge, which he has personally prepared. Your goal is to find his safe house. Succeed and he’ll present you with an offer you won’t refuse...

Solve the
riddles & puzzles

Journey through London in search of his safehouse

£19 per player
Fully flexible tickets

A slam dunk"

Huw Fullerton,
Radio Times

Players rate
Moriarty's game

4.6 out of 5
Based on 741 player responses

£19 per player
Fully flexible tickets


Text "AT YOUR SERVICE" to Professor Moriarty on 07723 482512.


Journey across the city, solving a trail of clues sent to your phone, in a treasure hunt-style experience.

Uncover galleries, pubs, museums, and secret locations. Pause for food and drinks at built-in break points.

Embark on your experience in teams of 2-5 players. Split large groups into multiple teams to play head to head.

This is an immersive game. You'll play a role in the story, interact with people on your journey, solve physical puzzles, and earn yourself a prize at the end.

You have full flexibility. After booking, you can add or remove players, change the date of your game, and get a full refund for any reason... tube strikes, friend’s fish dies, the apocalypse hits…

Evening Experience

This game is also offered as a 90 minute evening experience.

Over-18s are invited to complete Professor Moriarty’s evening challenge: journey between secret locations to unravel riddles, solve physical puzzles, and stop for drinks in some of the Professor’s finest haunts.

Available Mon - Sat from 5.30pm


Game details

Running dates

Runs every day. Booking required. Book early as some dates sell out.

Start time

3 hr-experience: 10am-3.30pm (so latest start time is 3.30pm). 90-min experience: 5.30-8.30pm (so latest start time is 8.30)

Start location:

The Marylebone pub, or if you're starting before 12.30pm head to Cafe Coco Momo Marylebone
93 Marylebone High St


2-3 hours across 2 miles, or 90 mins across 1 mile, plus optional breaks of up to 1 hour 15 mins

Can children take part?

Yes. Under 18s must be accompanied by an adult due to licensing restrictions at locations in the game. If there are under 18s in your team, start by 12:30pm so that you reach the final location by 4:30pm. The 90-minute evening experience is open to over-18s only.

Book your game


Play in teams of 2-5 players.
Supervised children welcome.

Select a dateDate

Yet to settle on a date? Poll your friends.

Starting between and

Total Cost:£

Fully flexible tickets, valid for 12 months: After booking, you can choose when to play then add or remove players, change the date of your game, or get a full refund, for any reason.