Play Stamp Or Sink
Decode it. Stamp it. Hope you were right.
Free on iPhone in the Roam app. Android coming soon.
Play free nowThe officer's first words are 'Sit, clerk.' After that the desk is yours: a brass cipher machine, a daily key, a lamp and a stack of enemy radio messages. Tap the glowing keys to decode each message letter by letter, then decide what gets stamped. Stamp Or Sink is a code breaking game online and free, played in the Roam app on iPhone, with a story you read between messages.
Your shift at the cipher desk
- Read the officer's lines and take your time; they set up the stakes.
- Check the daily key, then tap the glowing key on the typewriter to decode the next letter.
- Fill the cipher strip (22 letters on the first message) to reveal the text.
- Use the papers, mail and stamp tabs to decide what to stamp, then move to the next message.
What makes it tense
- A 26-key cipher typewriter you work letter by letter
- A daily key, the way wartime ciphers really worked
- Three messages on Day 1 and a skull counter in the corner
- A moody lamp-lit desk and a stern officer watching
A code breaking game online with a story
Most code breaking games are pure logic: guess the code, get feedback, try again. Stamp Or Sink wraps the decoding in a wartime story. Every message you crack leads to a choice about what to stamp, and the officer is watching.
That is why it plays like Papers, Please as much as a puzzle. The cipher is the work, the stamp is the decision.
Tips for a new clerk
Read every line of dialogue. The officer's instructions tell you what matters today, and the screen is dense, so slow down.
Follow the glowing key at first. It teaches the machine; once you know the rhythm, decoding goes fast.
Who should take the job
Stamp Or Sink suits players who like puzzles with weight. Decoding is calm and methodical, but what you do with the result can go wrong.
Fans of spy stories and wartime codebreaking will enjoy the setting: radio traffic, a typewriter and a superior who expects results.
More free games like Stamp Or Sink
Stamp Or Sink FAQ
What does Stamp Or Sink cost?
It is free. You play it in the Roam app on iPhone.
Is Stamp Or Sink like Papers, Please?
In mood and structure, yes: a desk job under a strict regime where each document leads to a stamp decision. The work here is decoding enemy messages instead of checking passports.
Do I need to know real ciphers to play this code breaking game online?
No. The game shows you which key to tap and gives you the daily key. You learn the machine as you go.
How many messages are there per day?
Day 1 has three messages, shown as MSG 1/3 at the top.
explore worlds
Play Stamp Or Sink free in the Roam app.