This thesis investigates the potential use of exergames, games controlled by the player’s body movements, to promote large and powerful arm movements as a means to combat sedentary behaviour. Two score-driven games, Smash It and Pop It, are developed to explore whether a scoring system could incentivise players to maintain or increase their arm movements as their skill levels increases. The study employ a methodology involving data collection from participants engaging with the games, with a focus on analysing movement and gameplay performance. Results indicate promising outcomes, with both games demonstrating effectiveness in motivating desired movements. While Smash It offers players freedom in gameplay, Pop It provides a more linear experience, allowing developers greater control over player actions.