The climate crisis is a result of human-caused global issues. Adopting the notion of sustainability is the key for surviving the repercussions of the climate crisis with minimal damage. Sustainability is a holistic approach to address the climate crisis. The green transition is a crucial strategy that can be used to promote sustainable global development. Measuring green transition performance enables countries to track their progress toward sustainability. This study aims to evaluate the green transition performances of 29 European countries through an integrated LOPCOW&CODAS method. The relative importance of performance indicators is calculated objectively by LOPCOW and then the overall performance scores are obtained by CODAS. The findings show that building energy efficiency, environmental impacts, and preserving and managing natural resources are considered the most critical factors in the green transition. Furthermore, this study explores the effects of applying different weight sets to set the robustness of the performances. Norway, the Netherlands, Estonia, and Austria are leading countries across multiple scenarios. By addressing these aspects, the findings provide deeper insights into green transition dynamics across Europe. Investments in the research and development of green transition should be given top priority by policy-makers who also support sustainable practices.