Play Secret Formula game free online which is a challenging brainteaser game. This is a classic simple game but going to give you the hard time to solve this puzzle. The story of the game is that a legend made a formula and want to keep it secret so that only worthy of the secret could find the formula. Do you think you can find out this formula. If you got a sense of investigating things then this is a simple game for you. But you will have to use your brain to solve this puzzle. Play King’s Guard game free also.