Tuning Educational Structures in Europe is perhaps the most important higher education innovation platform nowadays. The main objective of the Tuning Project is to develop a tangible approach to implement the action lines of the Bologna Process; thus, implementation and innovation are closely linked in Tuning. However, during its development, Tuning has evolved into a complex, multilevel policy implementation toolset with a worldwide significance. The purpose of this article is to present the complex nature of the Tuning Project, the environment and dynamics of its development, and the mechanisms of its operation from a multilevel implementation perspective, through a literature-review-based analysis.