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Welcome to Cipher Detective! Solve 100 hand-crafted cases in Story Mode, race the clock in Time Attack, and crack 5 classic ciphers in Real Cipher Mode.
Decode secret messages, solve word puzzles, and train your brain to win.
CIPHER DETECTIVE — a word puzzle, brain game, and cipher decoding game all in one. Solve word puzzles hidden behind secret codes, train your brain with logic puzzles, and crack cases as a detective — completely free to play, fully offline, no account needed. Every case hides a real word behind a numeric checksum — trace the letters, watch the running total build tile by tile, and verify both the password AND the key before the case closes. STORY MODE 100 hand-tuned cases across five ranks, from Rookie to Master Cryptanalyst. Each rank introduces exactly one new twist to the checksum — a shifted alphabet, an alternating sign, a per-row shift, a multiply modifier — so the difficulty always climbs one idea at a time, never all at once, like a true brain teaser should. Evidence text gives you an honest, riddle-style lead toward the answer, but a planted rival word means you can't just guess — you have to actually trace the grid to be sure. TIME ATTACK An endless run against a single countdown clock. This is the word finder half of the game: find real words on a freshly generated grid as fast as you can — solving one buys you more time and pushes the difficulty up a notch every ten cases. No shifting ciphers here, just speed and sharp eyes. Out of time? Watch a quick ad to keep the run going. REAL CIPHER Once you've closed all 100 story cases, a second specialty unlocks: five classic ciphers (Caesar shift, Atbash, a repeating key, reverse-and-shift, and a hidden-shift finale) with no grid to trace — just type your decoded answer on the keyboard like a real code breaker. This is the pure decoding half of the detective's job, with hints available if you get stuck. FEATURES - 100 story cases, procedurally-escalating Time Attack, and 50 classic cipher cases — three different ways to test the same two skills: words and numbers. - An offline puzzle game through and through — no wifi needed, ever. - Built-in tutorials the first time any new mechanic shows up — nothing to look up outside the app. - English and Bahasa Indonesia, switchable anytime in Settings. - No account, no sign-in, fully playable offline, free to download. Think you've got what it takes to make Master Cryptanalyst?