A city. A case. A sender you can’t trust.
Immersive mystery games played across Leeds by message. The first case is coming soon.
Join the waitlist
A city. A case.
A sender you can’t trust.
Immersive mystery games played across Leeds by message. The first case is coming soon.
What is Unknown Sender?
What is Unknown Sender?
Unknown Sender is a location-based mystery game played across the city using messages on your phone. Each game lasts 90–120 minutes and is designed for small teams seeking an immersive, cinematic experience.
Unknown Sender is a location-based mystery game played across Leeds using your phone.
You’ll receive messages and follow clues through the city.
Work as a team to solve a live case.
Each experience lasts around 90–120 minutes and is designed for small groups.
Choose your case and starting point
Receive messages on your phone
Follow clues across the city
Solve the case
Launching in Leeds
Unknown Sender’s first case launches in Leeds city centre. Additional UK locations will be added soon—watch for updates on new cities.
Launching in Leeds
The first case launches in Leeds city centre.
Additional locations and new cases will follow. Join the waitlist to be first to play.
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