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The Devil's CalculatorNewsSteam Summer Sale
Sale

Steam Summer Sale

The Devil's Calculator · published 26 Jun 2025, 17:01 UTC

All newsPlayers around this dateRead on Steam

The Devil's Calculator provides a sophisticated, challenging indie puzzler for lovers of logic and brain teasers. You don't have to be a math whiz to succeed, but it might turn you into a numberphile after all!

Play a demo and then buy at a Summer Sale special price!

Also try our newest math puzzle, Equate 8! All proceeds from game sales benefit the mission of Cinq-Mars Media non-profit in developing educational games, which are always provided free to teachers and students.

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Sale29 Sep 2025Steam Autumn SalePlay the award-winning challenge The Devil's Calculator ! Rather than the typical scenario of solving for x in an algebraic expression, imagine the operators themselves were unknown... In this challenging math game , an evil calculator has its normal arithmetic operators replaced with sadistically obscure functions. Using puzzle logic and a bit of algebra, you must work backwards to interpolate…Sale19 Dec 2024Steam Winter SaleDuring the Steam Winter Sale, try Cinq-Mars Media's games and take advantage of the discounts! Also check out our newest game, CrossAbout, at 20% off. The Devil's Calculator as presented at the MoMath conference:Sale27 Nov 2024The 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?