This report maps the contributions of 30 projects funded through Horizon 2020 and Horizon Europe to understanding and enacting the reform of research assessment. It approaches the reform of research assessment practices through the principles enshrined in the agreement on reforming research assessment. The report identifies relevant activities and results, analyses their role in contributing to the wider cultural change underpinning the movement towards reformed research assessment, disseminates promising practices and explores the potential for further work in this area. The sources reviewed include project documentation, qualitative survey responses by the coordinators and information from a small number of interviews and informal conversations, along with participation in events. (from executive summary of the study)