In this thesis, the advantages of renewable energy sources are studied as well as the risks of investing in them, such as market and operational risks. Game theory is a satisfactory way of approaching and analysing these risks in finding the trade-offs they create towards a potential investment. Then the risks are categorised by their nature ( political, economic and practical) and the 5 scenarios for dealing with them are analysed such as the reinforcement of feed in tariff, energy auctions , the cooperation needed from all sides ( state, producers and traders) and the labour required to implement them. The thesis consists of 5 chapters: The first chapter is the introduction to the subject of investment in energy market projects. The second chapter is the literature review on renewable energy, its market and the risks involved in new constructions. Τhe third chapter presents the research methodology and research questions. The fourth chapter analyzes risk mitigation measures, de-risking tools, and alternative policy scenarios for renewable energy investments, the last chapter contains the conclusions of the study and discusses the study’s limitations while offering recommendations for future research.