In 1943, the most secret messages in the world were locked by a
machine with 159 quintillion settings. Now it fits in your pocket.

Enigma Operator is a complete, historically faithful simulation of
the two most famous cipher machines of the Second World War: the
three-rotor Enigma I used by the German Army and Air Force, and
the four-rotor Enigma M4 carried aboard the U-boats. Every rotor
wiring, every reflector, even the machine's famous double-stepping
quirk is reproduced exactly - verified against the historical test
vectors. If it happened on the real machine, it happens here.

YOU DON'T JUST PRESS BUTTONS. YOU OPERATE THE MACHINE.
Open the lid and lift real rotors out of their box. Set the ring
positions. Plug the cords into the Steckerbrett. Scroll the
windows to the day's ground setting and watch the signal race
through a live wiring diagram with every key you press. Then sit
down at the captain's desk, where the actual documents of the
Kriegsmarine cipher system are waiting: daily key sheets, the
Kenngruppenbuch, bigram tables, the Tauschtafelplan, allocation
lists - all of them real, all of them working, all of them needed.

NEVER TOUCHED A CIPHER MACHINE? PERFECT.
A step-by-step interactive tutorial starts with a battery and a
lightbulb and ends with you performing the complete, authentic
Kriegsmarine decryption procedure by hand - the same document
chain a U-boat radioman worked through in 1943. No experience
needed. Just curiosity.

ALREADY KNOW YOUR ROTORS FROM YOUR REFLECTORS?
This is the deep simulation you've been looking for. Era-accurate
procedures from 1937 to 1943, including the doubled message keys
the Polish cryptanalysts exploited, the Kenngruppen system, M3/M4
compatibility, and the operator shortcuts Bletchley Park called
"cillies" - because the weak link in the chain was always the
human element.

SOMETHING NEW EVERY DAY
- DAILY DECRYPT: one fresh intercept each day, for each machine,
drawn from thousands of authentic daily keys. Same puzzle for
everyone, every day.
- SEND IT!: one message to encrypt each day - compose the full
transmission yourself, preamble and all, exactly by the book.
- TICK TOCK SETUP: race the clock to rig the machine from a real
key sheet.
- PROTOCOL PUZZLES: nine hand-built mysteries of garbled signals,
lazy operators, and impossible indicators. Deduce what went
wrong using nothing but the documents on your desk - with a
pair of rhyming hints if you're stuck, and a secret or two for
those who solve them all.

ALSO ABOARD
- A working notepad that keeps your worksheets
- Best times for every challenge
- Atmospheric sound, from the machine's keys to the hum of the
boat - all optional
- Fully offline. No ads. No accounts. No data collected. Nothing
between you and the machine.

Eighty years ago, breaking this machine took the best minds of a
generation. Setting it up correctly took a nineteen-year-old with
cold hands and a codebook. Tonight, both jobs are yours.