FREE CO-PLAY CASE
A Letter Without an Addressee
One clue for you. One clue for your partner. Together, find the letter’s destination.
Deliver one letter together
Play the first case from Three Harbor Signs free, through its answer and complete ending. Share two clue cards with a partner, or read both cards yourself.
Original fiction created with AI assistance.
Before you play
- Choose players A and B. On one device, read only your own clue card, close it, and pass the device to your partner. Share the clues aloud. You do not need printing or a connection between two devices.
- Both players may read the shared information and answer choices. Only one private card is visible at a time. Together, the two cards identify one answer in each case.
- Playing solo? Read A and B in turn. You may pause or reveal the answer whenever you like.
- Each card has an optional hint. A correct answer opens the reasoning and story ending. You may also choose Show answer.
- All necessary information is in the puzzle. You need no knowledge of a real town, extra equipment, or personal information.
Your case
Read your own clue card
Both cards are closed.
Bring the two clues together
How this case ends
Two more requests by the harbor
Next, put three photographs in order and find the room whose light must stay on. Two different kinds of puzzle, each solved by combining two cards.
The paid three-case collection includes this free letter case plus those two cases, with hints, reasoning, complete case endings, and a closing story.
Get the three-case collection · US$3 minimum
English and Japanese game ZIPs are included. They contain the same three cases; choose either language. Unzip and open index.html in a compatible browser. Phone support depends on the local HTML viewer. Check the final total and personal-use terms before payment. No purchase is needed to finish this free case.