Open Badges are digital representations of achievements or skills which describe the framework, significance, and outcomes of a learning procedure based on specific criteria. The "Open Badges' collection" can be used by its holder as a virtual CV of skills and qualifications. The practice of development, issue, and use of badges is connected with gamification elements, as badges are seen as incentives towards positive behavior and are powerful pedagogical tools. Furthermore, the use of Open Badges could become an alternative certification system for skills and knowledge acquired in online, blended and other informal learning environments and systems. In this article, we present case studies in which Open Badges have been used as credentials for educational practices in pilot educational systems, either in non-formal or informal learning systems, with specific emphasis on open learning environments. Key insights from these case studies highlight the extended use of Open Badges and stress the need for a common evaluation and accreditation system in open online learning environments.