Oliveira, Manuel Fradinho DuarteCrowcroft, JonSlater, Mel2015-11-112015-11-1120011017-4656https://doi.org/10.2312/egs.20011043We present Mayhem, which is a prototype of a Massive Online Role Playing Game (MORPG), where novel research in the field of Virtual Environments (VEs) is combined with the requirements of online games. This results in a novel approach to develop VE systems. The paper analyses the building blocks of the underlying system supporting Mayhem. The system design is based on component frameworks, with the core infrastructure of the game revolving around the Java Adaptive Dynamic Environment (JADE). We discuss the main extension Modules supporting the system, such as the networking module and the data manager.