Generalizing patterns is an important feature of algebraic reasoning that is accessible to students across grade-levels because it connects their numerical reasoning to algebraic reasoning. In this article, the authors describe how teachers can use the game Crack the Code to introduce generalizing to their students or can extend students' generalizations. Engaging students in this game gives teachers myriad ways to differentiate their instruction by asking questions that increase the level of difficulty with which students generalize, by providing manipulatives that will support and challenge students' thinking, and by selecting codes that will support new forms of algebraic reasoning to emerge. This article describes how the authors differentiated gameplay to meet the needs of all students while playing this game with sixth-grade students.