This paper presents a gamification methodology and ICT solution currently under development in the enCOMPASS European project, which aims at implementing and validating an integrated socio-technical approach to behavioral change for energy saving. To this aim, innovative user-friendly digital tools are being developed to make energy data consumption available and understandable for different categories of users and stakeholders (household residents, office employees, school pupils, building managers, and utilities operators) and to enable their collaboration to achieve energy savings in efficient, costeffective and comfort-preserving ways. The enCOMPASS platform supports user-centered visualization of energy data from smart meters and sensors and uses the gathered information to provide its users with context-aware adaptive recommendations for energy savings. Moreover, it relies on gamification elements to increase effectiveness and produce greater and more durable behaviour change.