The SAVE ENERGY will use a serious game providing an engaging believable virtual environment for citizens, consumers and policy makers to gain awareness, understanding and experience with regard to the issues associated with behavioural change and energy efficiency, in both the immediate and longer terms.The project will deliver a model that is simple, attractive and effective enough for users to actively and consistently engage with. Pilots will involve public buildings from 5 major European Cities (Helsinki, Manchester, Lisbon, Lulea and Leiden) that will demonstrate the extent to which tangible emissions reduction is achievable.The 5 pilots will use electronic sensors to measure energy usage, plug adapters between wall sockets and the devices that plugs into them will use the mains electricity as both a power source and means of communication, measure the energy used by devices, and communicate this to a local "gateway" system with a web interface. The information of a network of sensors will be gathered by a central server allowing for the data analysis and identification of consumption patterns and real time view, providing an action plan to adjust the energy usage pattern and hence, the carbon footprint. A given public space will become better informed of their energy profile and be given advice on adapting behavior.The pilots implementation will follow the Living Lab methodology, involving large communities of motivated citizens co-creating ideas, decisions and recommendations in the open innovation environment of SAVE ENERGY. This core group of Living Labs will collaborate along the project and will launch a Thematic European Network of Living Labs cities focused on Energy Efficiency and Sustainability.European wide dissemination of results will be provided to key stakeholders to influence Policy change, market impact and advancement of knowledge. Policy recommendations will be provided to the European Commission.