<< Objectives >>. Create 3 educational resources (board game, multimedia game, training plan) to tackle the topic of environmental sustainability; . Train 40 teachers on the appliance of game-based learning to teach serious topics in an entertaining manner.. Foster the development of green skills of 200 pupils through game-based learnin. Raise awareness among education professionals and young pupils regarding the danger in which our planet is, if we don't take proper action to protect it;<< Implementation >>. Daily management. Monthly online meetings. Quality control. Sharing and promotion activities (content creation for partners websites and social media; newsletters, article). 6 Multiplier Events (2 in Spain, 1 in Malta, 2 in Turkey and 1 in Greece). 3 Transnational Meetings in Spain, Turkey and Greece. Board game design. Multimedia game design. Training design. Training of teachers. Piloting of the games. Data analysis (feedback and impact)<< Results >>TANGIBLE . Board game. Multimedia game. Guide (containing a training and piloting plan, feedback and evaluation questionnaire, impact and feedback report). Promotional materials (newsletters, infographic, articles etc.)INTANGIBLE 40 teachers who develop their skills and knowledge on applying game-based learning and gamification to teach serious topics;200 pupils who develop their Green skills;Teachers and pupils are more aware of the danger caused by used plastic to the environment.