Mystery games delivered through your phone. Receive cryptic messages, decode hidden clues, and race to uncover the truth — one case at a time.
Unknown Sender
Active now
Receive cryptic messages, documents, and voice notes directly in your app inbox — as if the unknown sender is texting you in real time.
Decode encrypted texts, examine photo evidence, and analyse audio recordings. Every clue is a piece of the puzzle.
Choose from multiple hand-crafted mysteries. Each case is a self-contained narrative with unexpected twists and a satisfying resolution.
Clues unlock progressively or on demand. Whether you binge in a weekend or savour over weeks — it's your investigation.
Miss a clue? Replay any case and discover hidden details you overlooked the first time. Every replay reveals something new.
Share access with friends and crowdsource the solution. Unknown Sender is a mystery game that works perfectly for groups.
Browse our case files in the app. Pick the mystery that draws you in and unlock it instantly.
Your phone becomes a crime desk. Cryptic texts, images, and audio clues arrive from the unknown sender.
Connect the dots, submit your answer, and uncover who the sender really was — and why they chose you.
"I couldn't put it down. Stayed up until 2am trying to crack the final cipher. Worth every second."
S. Mackenzie
Beta Tester
"The in-app messages felt so real. For a moment I genuinely forgot it was a game. Absolutely haunting."
R. Thornton
Beta Tester
"Best mystery experience since escape rooms — and I can play from my couch. The clues are brilliantly layered."
J. Calloway
Beta Tester
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