- February 18, 2019
- Cinq-Mars Media
The Devil's Calculator
Platforms
About
The Devil's Calculator is a single player and multiplayer casual puzzle game. It was developed by Cinq-Mars Media and was released on February 18, 2019. It received overwhelmingly positive reviews from players.
The Devil's Calculator is a new, non-profit math game by the creator of Synonymy that proves a sophisticated, challenging and educational indie puzzler for numberphiles and lovers of logic and brain teasers


- Unique and clever math puzzle game that challenges players to reverse engineer mysterious calculator operations.
- Well-designed difficulty curve that starts accessible and becomes increasingly challenging, rewarding logical thinking and experimentation.
- Engaging theme and aesthetic that adds character and humor, making math puzzles enjoyable for math enthusiasts.
- Built-in calculator interface is clunky and unintuitive, lacking useful features such as backspace and key mapping for functions.
- Occasional bugs and UI issues like window resizing problems and unclear menu navigation can hinder gameplay experience.
- Limited educational value for formal learning as the game focuses more on puzzle solving than thorough mathematical concept teaching.
- gameplay6 mentions Positive Neutral Negative
The gameplay is centered around a clever and thematically integrated puzzle mechanic where players use calculator functions to reach the number 666, with unique constraints that enhance challenge and strategy. However, the UI can feel slightly cumbersome, potentially hindering immediate engagement with the core gameplay. The developer also seeks to connect the mechanics with higher-level academic concepts, indicating a thoughtful design approach.
“Devil's Calculator is a puzzle game focused on the mechanic of creating the number '666' using all the functions on the calculator.”
“It helps that the developer found an insanely clever way to present the gameplay through its theming: the goal of every level is to use the operators to create the number 666.”
“The unique decimal representation works well with the mechanic to disable certain buttons (e.g., if the operator allows neutral operations with certain inputs, just disable the 6 button so players can't simply type 666 and perform a neutral operation).”
“The UI makes it slightly cumbersome to get to the meat of the gameplay.”
“The following line was in the email I was sent: 'We're reaching out to graduate students in mathematics to see if they'd enjoy devising puzzles for the community and to get any feedback they'd be willing to share on how the game's mechanics can better relate to higher-level academic concepts.' I had a desire to do this without my real name being attached to it, so I figured I'd respond via review.”
“But maybe this helps show that the theme (probably) wasn't chosen arbitrarily, but there were gameplay reasons for it.”
Games Like The Devil's Calculator
Frequently Asked Questions
The Devil's Calculator is a casual puzzle game.
The Devil's Calculator is available on PC, Mac OS, Phone, iPad and others.
The Devil's Calculator was released on February 18, 2019.
The Devil's Calculator was developed by Cinq-Mars Media.
The Devil's Calculator has received overwhelmingly positive reviews from players. Most players liked The Devil's Calculator for its humor but disliked it for its gameplay.
The Devil's Calculator is a single player game with multiplayer support.
Similar games include Human Resource Machine, TIS-100, Hook, Turing Complete, Hook and others.





