Cipheur

Released Mar 2025

Cipheur is a free cryptogram game, allowing you to test your logic and language skills against 100 quotes by famous people. Do your best to discover intriguing patterns, unfold the coded messages step by step, and enjoy the incomparable satisfaction of deciphering another sentence.

82% positive · 138 reviews

Not yet

Released, but still in active development

High confidence

Active Development

Not yet

Released, but still in active development

High confidence

Active Development

Where to get it

Free on Steam

Steam Free

Evaluation

Cipheur launched as a free-to-play cryptogram puzzle game on March 12, 2025. Since then, developer Error 300 has maintained a consistent and prolific stream of paid DLC content packs spanning a wide variety of themes — famous quotes, proverbs, video game quotes, uncommon words, famous last words, stupid laws, Russian-language packs, and a growing Trivia series covering biology, astronomy, chemistry, physics, geography, and food. In total, the DLC list now includes 29 released packs, with additional packs announced and released via news posts that appear to be separate store listings not yet reflected in the tracked DLC list (Trivia: Food on June 19, 2026; Trivia: Biology 3 on May 14, 2026). The developer published a roadmap in July 2025 outlining upcoming releases through August 2025, all of which were subsequently delivered on schedule — demonstrating a reliable development and release pattern. The Trivia series in particular has been expanding sequentially (Biology, Biology 2, Biology 3), and other series have followed the same numbered pattern (Famous People Quotes 1–5, Uncommon Words 1–3, etc.), strongly suggesting further entries are in development. The most recent confirmed DLC release was Trivia: Food on June 19, 2026. No developer statement has indicated that DLC development is concluding.

Evidence

Trivia: Food DLC released, available at 10% launch discount — the most recent DLC release as of the assessment date.

news post · Jun 19, 2026 source content shipped

high

Trivia: Biology 3 DLC released, the third entry in the Biology trivia series, continuing the sequential expansion pattern.

news post · May 14, 2026 source content shipped

high

Content

29 of 29 released · no outstanding content

Released

Cipheur - Trivia: Biology 2

Mar 2026

Released

Cipheur - Trivia: Geography

Jan 2026

Media

Details

Developer

Error 300

Publisher

Error 300

Achievements

Platform

Windows, macOS, Linux

Controller

—

Steam Deck

Not rated

Players

Single-player

Casual Board Game Education Puzzle Sandbox Word Game Minimalist Free to Play Text-Based

About this game

Letter by letter, word by word, sentence by sentence - the work of a cryptographer is far from easy. Luckily, we have you, our talented codebreaker! Take your place at the machine and confront diverse, highly intriguing encrypted messages, all requiring sharp thinking and cleverness to unravel.

Step by Step

At first, each message will seem like incomprehensible gibberish - convoluted, seemingly meaningless. However, nothing could be further from the truth! By deciphering subsequent letters and words, you will quickly find a pattern that will allow you to decipher the entire message.

So much to discover!

Uncovering a variety of quotes rich in humor, wisdom, or insight can be challenging, yet with 100 levels to complete you are sure to have enough room to hone your skills and become the true expert. Each new message grants a sense of satisfaction and an insight into the wisdom of the brightest people in history!

Nearly endless content

Your decoding journey can continue almost endlessly, with Cipheur offering a rich supply of extra coded message packs. Test your wits against sets like Last Words, Proverbs, Stupid Laws, Uncommon Words and many more! All this wrapped in a pleasant, simple and concentration-friendly visual layout to help you work and relax.