Crack the Code

Ten puzzles, easy to hard. Name the technique that cracks each secret message and decode it, then spot the flaw in a broken function and choose the right fix.

Up to 1000 points. No timer: take your time, hints cost 25 points.

The flawed functions are plain JavaScript, and every puzzle was checked by running the code. Scores are counted in your browser, so leaderboard places are for fun rather than verified records.

About Crack the Code

Ten puzzles, easy to hard: name the technique that cracks each secret message, then spot the flaw in broken code.

Each run mixes two kinds of puzzle. In a cipher puzzle you are shown a coded message and must choose the technique that cracks it (a Caesar shift, Base64, Morse, a rail fence, frequency analysis on a substitution, a Vigenere key) and then type the decoded text. In a fix-the-code puzzle you are shown a short JavaScript function with one flawed line: click the line, then choose the replacement that makes it correct. Puzzles get harder as the run goes on, hints cost points, and every explanation tells you why the answer works. Earns XP and leaderboard places in the K3N8H arcade when you are logged in.

What you get

Live playable game at /play/code-breaker (free, unlimited plays)
Ten cipher techniques and seventeen broken-function puzzles, with a freshly generated message every run
An explanation after every puzzle: why the technique works, why the bug was a bug
Arcade XP, achievements and leaderboard when logged in
Commercial license: white-label/embed this game on your own site

A puzzle game for entertainment and learning. The ciphers are historical or encoding techniques, not secure encryption. Leaderboard scores are counted in each player's browser, so places are for fun rather than verified records.

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