The ORION co-creation menu was developed through desk research and consultation with research funding and performing organisations already participating or hosting co-creation experiments. The menu builds upon the Action Catalogue of Engage2020, an EU project seeking to engage society in Horizon 2020. The Action Catalogue is a dynamic selection tool containing an exhaustive collection of methods to engage different audiences with science and research. The ORION co-creation menu contains only those methods that enable bidirectional participation. The menu contains 31 methods sorted according to the level of participation required by the different interest groups.