Morse code puzzles for escape rooms and treasure hunts
A good Morse code escape room puzzle hides a short answer, usually three or four figures for a padlock or a single word, in a form players can see or hear, and gives them a way to decode it. Get two things right and almost any format works: the gaps between letters must be clearly longer than the gaps inside them, and the key, a Morse chart, must be somewhere players can find it.
Everything else is decoration. Here is how to choose the answer and the format, how to make it solvable, and how to test it before the players arrive.
Start with the answer, and keep it short
Decide what the puzzle unlocks before you decide how it looks. The best answers are short.
Three or four figures for a combination lock. Figures are the friendliest Morse there is. Every figure is exactly five elements long and no letter is, so players can see where each one starts and ends, and the pattern is regular enough to work out:
| Figure | Code | Rhythm |
|---|---|---|
| 1 | .---- |
di-dah-dah-dah-dah |
| 2 | ..--- |
di-di-dah-dah-dah |
| 3 | ...-- |
di-di-di-dah-dah |
| 4 | ....- |
di-di-di-di-dah |
| 5 | ..... |
di-di-di-di-dit |
| 6 | -.... |
dah-di-di-di-dit |
| 7 | --... |
dah-dah-di-di-dit |
| 8 | ---.. |
dah-dah-dah-di-dit |
| 9 | ----. |
dah-dah-dah-dah-dit |
| 0 | ----- |
dah-dah-dah-dah-dah |
From 1 to 5, the figure is the number of dits it starts with. From 6 to 9, it is five plus the number of dahs it starts with, and 0 is five dahs. A sharp team can crack figures without a chart once they spot that, which makes a satisfying moment.
A word for a letter lock or a spoken password. Four or five letters is plenty. Avoid SOS: players guess it before they decode it.
A direction for a treasure hunt. SHED, TREE, UNDER BED. Short words, one per clue.
Long messages are not harder in a good way. They are just slower, and one misread letter sinks the whole team.
Formats that work
Morse is short, long and silence, so anything with two lengths can carry it.
Sound. A buzzer, a speaker playing a looped recording, a game master knocking on the door. Sound is the most authentic format and the hardest to decode, because players have to hold the rhythm in their heads while they write. Play it more slowly than feels natural, with extra space between characters, and leave a long silence before each repeat so the start is obvious.
Light. A lamp that blinks, a flashlight in a window across the garden, an LED behind a grille. Light lets players count, so it is easier than sound. Make the dark gap between letters plainly longer than the gap between flashes, and put a long dark pause before the message repeats. Aim lights at a wall or a window, never into anyone’s eyes. How to signal Morse code with a flashlight covers the timing by hand.
A printed tape. A strip of paper with dots and dashes, the way early telegraph registers marked messages on a moving paper tape. Hide it in a book, roll it inside a bottle, or cut it into pieces with a number on the back of each so players must put it back in order. Morse code on paper tape has the history if you want to theme the room.
Objects. Beads on a string, thin and thick books on a shelf, round and long pebbles along a path, buttons and matchsticks glued to a card, chalk marks on a fence. Objects suit outdoor treasure hunts, where a sheet of paper will not survive the rain.
Hidden in the room. Dots and dashes in a picture frame’s border, holes punched in a lampshade, stripes on a poster. Here the puzzle is noticing that it is Morse at all, so have a hint ready if nobody does.
Make it solvable: spacing and the key
Most broken Morse puzzles fail on spacing. Morse has three gaps: 1 unit inside a character, 3 units between characters and 7 units between words. If the gaps between characters shrink, letters run together. The letters A .- and N -., sent with too small a gap between them, read as P .--., and the team is stuck on a letter that was never there. Why your Morse letters run together explains the problem in full.
So exaggerate the spacing. On paper and in objects, leave a clear space between characters and a slash or a wide gap between words. In sound and light, stretch the gaps between characters well beyond normal, the way Farnsworth spacing does for learners, and keep each dit and dah crisp and distinct.
Then give players the key, unless knowing Morse is the point of the room:
- A chart on a poster, on the back of a map or inside a drawer. A chart that is itself the reward for another puzzle makes a good chain.
- A Morse tree instead of an alphabetical list. Players find each letter by following dits left and dahs right; the Morse code tree shows how it works.
- A partial key: only the letters the answer uses, or a chart with gaps that a second puzzle fills in.
A few more things trip players up:
- Morse has no capital letters and no code for # or most symbols. Keep answers to letters and figures.
- Draw dits as round dots and dahs as clear lines. A dot that looks like a short dash starts an argument.
- Keep red herrings obviously not Morse, or leave them out.
- Plan your hints in tiers: first “this is a message”, then “look at the poster in the hall”, then the first letter of the answer.
Test it like a player
You are the worst tester of your own puzzle, because you already know the answer. Before game day:
- Decode it yourself from the finished thing, not from your notes: the printed tape, the lamp blinking in the room’s real light, the audio through the actual speaker.
- Hand it to someone who has never seen it and watch without helping. Note where they stall; that is where the hint goes.
- Check the answer against the lock, in the order players will read it. A four-figure code read in the wrong order is an easy way to lose ten minutes.
- Run the loop end to end. Can a player who walks in halfway through tell where the message starts?
- Check the room, not your desk. A light that is clear in a dim office can vanish in daylight, and a buzzer that is clear on its own is lost under a team all talking at once.
Making the parts on a Mac
A chart and a pencil are all you strictly need. If you build props on a Mac, Dot & Dash handles the fiddly parts. Its Text to Morse turns your answer into dots and dashes ready to copy into your own layout for a printed tape or card, and plays it on its machine so you can check it by ear. For a sound puzzle, type the answer in Write and share it as an .m4a audio file to loop on a speaker: it holds the tone and the machine’s own sounds and no text. The file is named after the message, so rename it before it goes into the room. Leave the tape image and the video out of the puzzle: the image prints each letter under its marks and the video shows the words as it prints, so both give the answer away. Write and audio need a license after the free 24 hours.
Questions
What is the easiest Morse code puzzle for beginners?
A three or four figure padlock code written on paper, with a chart somewhere in the room. Every figure is five elements long, so players can see where each one starts and ends.
How do I stop players confusing letters?
Make the gaps between characters clearly longer than the gaps inside them, and put a slash or a wide space between words. Most misreadings come from gaps that are too short.
Should I put a Morse chart in the room?
Yes, unless knowing Morse is the point of the game. Hide it behind another puzzle or inside a drawer if you like, but make sure players can find it.
How do I show where a looping message starts?
Put a long silence or a long dark pause before every repeat, much longer than a word gap, so players can hear or see where the message begins.