We discuss the development of a prototype of a multiuser online edutainment platform to provide an immersive and engaging learning and teaching experience. This project is aimed at developing a cyberworld with game-based learning modules that have collaborative, intuitive, assistive, and educational features. Users (teachers, students, contributors) will be able to select, customize, sequence, and integrate edutainment content in a modular way. This mechanism is inspired from the in-game level design engine technology in videogames. To support learners with physical and mental disabilities, technologies such as intelligent agents and assistive devices are employed. Edutainment modules to assist patients in rehabilitation and to support children with specific learning disabilities are developed. This platform is developed and evaluated in 4 stages: standalone, integrated, online, and multiuser. To ensure scalability and transferability, this platform is developed based on the SCORM standard.