Codebreaker is a puzzle game for the Atari 2600, typically bundled with Brain Games under Sears' Tele-Games label. The player's objective is to guess a sequence of numbers within a limited number of attempts. The game offers various difficulty levels, adjusting the length and complexity of the number sequences. Clues are provided after each guess to aid in deducing the correct sequence. Using the Atari's keyboard controllers, this title falls within the educational and logic game genres, primarily designed to test and improve players' deductive reasoning skills.