CipherStreet vs Casefile

CipherStreet is a story-driven puzzle game where every level is a real cryptographic cipher - from Caesar shifts to RSA public keys - wrapped in a cold-war spy thriller. Intercept encoded messages. Decode them with on-screen tools you discover, not tutorials you sit through. Unlock fragments of a decades-spanning conspiracy with every cipher you crack. By the end of ten chapters you'll have genuinely internalised the foundations of modern cryptography - roughly the first four weeks of a university course — without a single lecture. THE STORY A defector known only as The Architect has built a private intelligence network hidden inside ever more sophisticated ciphers. Your handler, Agent Kovács, sends each intercept with minimal context and maximum urgency. A mole. A missing codebook. A name that keeps reappearing across fifty years. Crack the codes before dawn. TEN CHAPTERS, TEN REAL CIPHERS • Caesar cipher: frequency analysis • Vigenère: the pattern inside the pattern • Rail Fence: transposition • Enigma (simplified): the crib attack that broke a war • Playfair: grid geometry • One-Time Pad: the perfect, unbreakable lock • Diffie-Hellman: sharing a secret in public • RSA: math as a lock • Hash functions: integrity, not secrecy • Steganography: messages hidden in plain sight WHAT MAKES IT DIFFERENT • Learn by doing: tools are discovered through play, never explained at you • Real, historically accurate cryptography, all running offline on your device • A genuine spy narrative with characters, twists, and a finale that recasts everything • No punishing fail states: get a cipher wrong and the story simply waits • Build and share your own encrypted intercepts; challenge friends to crack them FREE TO START Chapters 1–2 are completely free, no account required. A single one-time purchase unlocks chapters 3–10 and every cipher type in the Builder. No ads. No subscriptions. No tracking. The cipher is never the weakest link. The human always is.

You are handed a box of evidence from an unsolved murder. Police reports, witness interviews, crime scene photos, phone records, a coroner's report, newspaper clippings. Everything the detectives had. The killer is somewhere in the file. Your job is to find them. CASEFILE is a cold case detective game. No hand-holding, no arrow pointing at the answer. You read the documents, cross-reference the details, catch the one lie that doesn't line up, and prove who did it. HOW IT PLAYS - Work through a real case file packed with authentic-looking evidence. - Crack it by cross-referencing at least three documents. No single page gives it away. - Clear objectives to move forward: establish the timeline, narrow the suspects, then name the killer and the motive. - Interrogate suspects in live conversation. Ask the right questions, present the right evidence, catch them in a contradiction. WHY IT HOLDS UP - Every clue ties back to the case. No filler, no dead ends. - Every lie is catchable somewhere in the evidence. - Every red herring has andig. The first case is free, start to finish. Close it and a membership unlocks the full library plus a new case every month. Play solo, or bring in others on the Duo and Squad tiers. The file is on your desk, detective. Terms of Use: https://casefile.techapps.dev/terms