CRACK
THE
CODE
Guess the secret code.
Beat your opponent.
How to Play
Each player sets a secret code. Take turns guessing. After each guess you get colour feedback:
First to crack the full code wins!
Play on mobile with friends or strangers
What is Crack The Code?
Crack The Code is a 2-player code-breaking game inspired by the classic Mastermind format. Each player sets a secret digit code of 3, 4, or 5 digits. Players then take turns guessing each other's code, receiving colour-coded feedback after every guess to narrow down the answer.
Green means the right digit in the right position. Orange means the right digit in the wrong position. Red means the digit doesn't appear in the code at all. Use the clues strategically to eliminate possibilities and crack the code before your opponent does.
Tips & Strategy
Start with a guess that covers as many different digits as possible — for example 1234 on a 4-digit code. Each piece of feedback eliminates large chunks of possibilities. Avoid repeating digits in your secret code as they're easier to guess. The longer the code, the more combinations your opponent has to work through.
Frequently Asked Questions
Is Crack The Code the same as Mastermind?
It's inspired by Mastermind but played head to head — both players set a secret code and try to crack each other's simultaneously. First to crack wins.
What code lengths are available?
You can choose 3, 4, or 5 digit codes. Longer codes are harder to crack and make for longer, more strategic games.
Is it free to play?
Yes — random matches and offline vs AI are always free. Friend rooms cost 1 credit.
Can I play on mobile?
Yes — download Duo Game Club on iOS or Android to play Crack The Code and 3 other games on your phone.