The Devil's Calculator
Playing now
1+1 vs. yesterday
25%of peak
All-time peak
428 Sep 2026
25 announcements · from The Devil's Calculator’s Steam news feed
All gamesRead every half hour while active
Playing now
1+1 vs. yesterday
All-time peak
428 Sep 2026
| Published | Kind | Announcement | Build |
|---|---|---|---|
| Sale | The Devil's Calculator discounted in the Steam Autumn Sale! You don't have to be a math whiz to enjoy playing our award-winning puzzle game, The Devil's Calculator! The total will always be 666. Can you find the equation? | — | |
| Sale | Steam Summer Sale Find a new favorite and save now! · The Devil's Calculator · Trade Bots · Copy Editor · Lazy Chess · Synonymy | — | |
| Sale | Steam Spring Sale Including The Devil's Calculator, Trade Bots, Copy Editor, Lazy Chess, and Synonymy Play demos, find your new favorite, and buy it at a low price! Proceeds benefit the Cinq-Mars Media Nonprofit mission of developing educational games and technology. Our games are always free to students and educators. Cinq-Mars Media is a 501(c)(3) charitable organization based in Kalamazoo, Michigan. | — | |
| Sale | Steam Winter Sale The Devil's Calculator and other games from Cinq-Mars Media non-profit are all on sale! Try a demo and find a new favorite! | — | |
| Sale | The Devil's Calculator and other Cinq-Mars Media games discounted Get our award-winning math game, The Devil's Calculator, at a special price! You don't have to be a math whiz to love this puzzle game! Cinq-Mars Media games are always free to educators and students who contact us. | — | |
| Sale | Steam Summer Sale All Cinq-Mars Media games are 20-40% off during the Steam summer event! Try a demo and find a new favorite! | — | |
| Major update | Seamless Discord and Wolfram Integration, UI + Speed Improvements and Podcasts! Our team has made a long overdue update to the game in celebration of our non-profit's latest release, Trade Bots ! Along with several bug fixes, performance improvements and upgrades to modern frameworks, we've added several new features, all in widescreen mode. (by default, the game opens in a vertical window, but you can full screen the game by hitting the expand button on all three platform… | 11499247 | |
| Sale | The Devil's Calculator is 50% off in the Steam Puzzle Fest The Devil's Calculator is a captivating math puzzle game based on a narrative in which an evil calculator has had its normal arithmetic operators replaced with sadistically obscure functions. Using logic and a bit of algebra, you must work backwards to find the equation for the "number of the beast," 666, at each level. Innovative and addicting, this game will appeal to numberphiles and math no… | — | |
| Sale | Steam Spring Sale Cinq-Mars Media games discounted 33-75% in the Steam Spring Sale! · Copy Editor · The Devil's Calculator · Lazy Chess · Synonymy While you're browsing, you can also download our new demo, Trade Bots! | — | |
| Sale | Steam Autumn Sale Tired of calculating football team standings? Try a different math challenge! The Devil's Calculator is on sale now! | — | |
| Sale | Steam Summer Sale The Devil's Calculator, Copy Editor, Lazy Chess, and more are all 30% off during the Steam Summer Sale! | — | |
| Sale | Logic & Numbers Bundle The Devil's Calculator is featured in the new Logic & Numbers bundle. Get 16 fantastic puzzle games at a significant discount! If you already own The Devil's Calculator, you will get an additional amount off of the price. If you don't own it, consider this amazing bundle! You know you'll want some variety to play when the colder weather keeps you inside! | — | |
| Sale | 50% off during the Steam Halloween Sale The Devil's Calculator is 50% off for the Steam Halloween Sale! Named a PAX Top 10 Indie Game and a Webby Award Nominee, the Devil's Calculator is an exciting challenge for numberphiles, math novices, and puzzle lovers. | — | |
| Major update | New Game Mode and UI Improvements! Hi Everyone, This is Chris, the lead developer. I'm so pleased to announce that after a considerable hiatus, we were able to find the time and resources to integrate a few features we've been wanting to add for a long time. One of the biggest points of feedback we received was the somewhat tedious menu system - we made an artistic decision to try and go for an analog / diegetic feel with the me… | — | |
| Esports | Summer Sale | LIVE Developer Play In celebration of the Steam Summer Sale, we're playing The Devil's Calculator and answering all of your questions live! | — | |
| Release | Lazy Chess DLC Well well well, what have we here? 😈 Lazy Chess created a DLC Level for it’s evil older sibling, The Devil’s Calculator 🔥 It’s a wickedly challenging crossover! Use skills you gained in our new game Lazy Chess to noodle out a fiendish mathematical puzzle. Available now, free, in every copy of The Devil’s Calculator, our Webby-Nominated math puzzle game! | — | |
| Community | Webby Nominee for Best Puzzle Game Our non-profit is honored to shared that our puzzle math game, The Devil's Calculator, was nominated for a Webby Award for best puzzle game of 2020. The winner is determined by public vote so we need your help! We're always updating new DLC levels, so follow us on @devilscalc and reach out if you need help coding a level for the community. Hope everyone is staying safe and coping as best they c… | — | |
| Community | PAX, MoMath and new free DLC! Hi Everyone! Thrilled to share with you all that the Devil's Calculator was a selected as one of the PAX 10 indie games of this year. If you're going to be in Seattle Friday August 30th through Monday September 2nd, please stop to say hi! Additionally, we were recently featured at the Museum of Mathematics in New York City where I gave an in-depth presentation on the game for their MOVES confer… | — | |
| Community | Version 4.0 Live, More Free DLC and New Features Hi Everyone! Excited to share our newest update with the community: · New DLC by Tony Padilla and other mathematicians · Deeper integration with Wolfram Alpha including custom hints, notebooks and scatterplots · Wolfram MathWorld resources for all puzzles · Interactive Tutorial added for first level · Improved BigInt performance across the game · Bug Fixes including issues with data persistence… | — | |
| Community | Major Update: Version 3.0 with Free DLC Hi Everyone! So thrilled and grateful for the positive feedback we've been getting on the game - we never expected it would gain such a following. We've been working around the clock to add tons of new features asked for by the community and lots of stability improvements, all outlined below! · Free DLC section added with levels by famous mathematicians like James Tanton and James Grime! · Tons… | — | |
| Community | Improvements for Online Level Creation Hi everyone! Due to popular demand, we're integrating an advanced math library (math.js) so that users can build even more sophisticated levels, easier. We're going to be switching over from javascript to the math.js eval syntax (which is much simpler) and we're including support for ternary operations so you can still do things like, (if the input is even, do this, else do that). This will add… | — | |
| Game update | Major bug now fixed (server issue)! If you installed (or perhaps even played) the game between 4:30pm and 7pm today, Monday February 18th , there was a very strange bug that caused the game to break (slides wouldn't work and would flash, game would be unplayable). Around 4:30pm I was messing around with the backend, adding content and making fixes, and I broke something server side that caused this. I'm so, so sorry. If affected,… | — |
Announcements are the developer’s own posts to the game’s Steam news feed: updates and their patch notes, in-game events, releases and sales. The important ones are marked on the players chart.