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The Devil's Calculator

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  1. Steam2.0 · 560 reviews
    $2.99View Offer

Trailers & screenshots

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About The Devil's Calculator

The Devil's Calculator is a puzzle game about an evil calculator whose ordinary arithmetic operators have been replaced by obscure functions. You use logic, algebra and interpolation to work out what the corrupted operators do, then calculate 666—the “number of the beast”—to purge the calculator of its demons and progress.

Solve the operators

Each level asks you to decipher a mysterious operator and use it to reach 666. Advanced graphing mechanics and other resources help you interpolate and solve the function puzzles. The game includes more than 20 levels in its Demo.

Create and play levels

As you progress, you unlock tools to make your own levels and play challenges created by other players. The game also includes free DLC levels made by its creators, educators and mathematicians. Hand-drawn artwork and a story accompany the puzzles.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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