The recent amendment in Greece, L.5215/2025, has updated the legal framework to support 'Landmark Investments of Outstanding Significance'. The legislation targets investments that significantly contribute to sustainable development, innovation, energy transition, and economic competitiveness in Greece. Key features of the new law include the classification of projects promoting the green economy, innovation, and renewable energy sources, with a specific focus on infrastructure projects combining renewable power generation and hydrogen production systems. Notable incentives such as tax stabilization, fast-track licensing, and state aid up to 100% for R&D and employment costs aim to attract investors to strategic sectors like renewables and circular economy. The legislation's emphasis on renewable hydrogen production, offshore wind farms, and critical raw materials aligns with Greece's goals for a green and energy transition. Projects within De-lignification Zones and those under the TCTF benefit from enhanced aid percentages, further boosting investment prospects. Overall, the new legislation provides a clear framework to support large-scale investments, aiming to strengthen the Greek economy and facilitate a sustainable transition.