Mathematical fluency supports maintenance of mathematical skills (Shurr et al., 2019). Multiple interventions support fluency, including the use of games. However, limited research exists exploring games as a means of increasing student fluency in mathematics. In this single case design study, researchers examined the relation between four elementary students' fluency with single-digit multiplication problems and playing the Product Game, which is a game focused on whole number multiplication facts. Researchers found a functional relation between the intervention of playing the game for 10 min and student accuracy with digits and answers on a 1 min multiplication fluency probe. Overall, students also maintained higher digit and answer rates.