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Play 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 and use these corrupted operators to compute the 'number of the beast', 666, to purge the calculator of its demons and conquer mathematical puzzles.

If you love math and logic puzzles, also try our newest number game, Equate 8!

See The Devil's Calculator, Equate 8, and more on our Developer page:

https://store.steampowered.com/developer/cmm