Undoubtedly, educational Games figure among the most exciting learning objects. Their features, which involve motivational issues, interaction, attractive graphics and ludic activities, would empower them to become perhaps the most effective type of educational resource available. However, research has shown that current educational games' impact are far from expected, due to a vary of factors that go from boring, inappropriate game design to the difficulty to adapt them to different educational contexts. The present paper discusses the application of openness principles to educational games development process. Open Educational Games would address many of the issues currently faced by conventional educational game. Since there are many challenges to overcome to achieve this goal, this work aims to discuss the main ones, presenting some perspectives for the present and future.