Context: The purpose of this thesis is to introduce gamification in a community-based application with the goal of improving energy sharing and collaboration within Renewable Energy Communities (RECs). As worldwide concerns about climate change, energy poverty, and energy sharing continue to grow, integrating gamification into applications has emerged as an impactful method to engage and educate users about energy-sharing practices. This thesis provides detailed insight into the synergy between RECs, community energy management, and gamification. Renewable Energy Communities (RECs) are citizen-driven initiatives that aim to promote the use of renewable energy sources and energy efficiency within local communities. They are a means to restructure our energy systems by harnessing the energy and allowing citizens to participate actively in the energy transition and thereby enjoy greater benefits.