The central objective of the FEEdBACk project is to promote, stimulate and deliver energy efficiency through behavioural change. To encourage more efficient energy use and more responsible consumption behaviour, a gamification platform was developed to motivate this behavioural change, promoting consumer awareness and engagement through a pervasive mobile application. This application analyses the consumer context, sends personalised messages and manages competition between consumers in the same building or condominium, whether it is a business or domestic environment. The approach to motivate behavioural change is promoted intrinsically, taking advantage of temporal opportunities, in the consumer's daily life, to improve energy efficiency without compromising comfort.