Deduce a hidden colour code, but submitting a guess costs coins, and even the feedback pegs must be bought, so you must crack it before your budget runs dry.
Codebreaker Market is a colour-code deduction puzzle wrapped in a tight coin economy. The market hides a secret code of coloured pegs. You build a guess and submit it for coins, but the clue pegs are not given freely, after a guess you choose which information to buy: the count of right-colour-right-spot pegs, the count of right-colour-wrong-spot pegs, or a reveal of one secret position. Crack the code before your coins run out.
Guessing a hidden code of coloured pegs and reading the feedback is Mastermind, invented in 1970 by Mordecai Meirowitz and itself a descendant of the older pencil-and-paper game Bulls and Cows.
The original layer is that clues cost money. A guess earns coins; the feedback pegs must be bought, and you choose which ones.
Mastermind hands you complete feedback free, so optimal play is a solved information problem. Charging for clues makes it an economic one instead — the question is no longer what to guess but how much you need to know before guessing again.
Codebreaker Market reinvents the hidden-code deduction genre by charging for information, turning pure logic into a budgeting puzzle. It is an original free browser game built for PlayPendium.