**6. Conclusion and future work**

This chapter attempts to overcome some problems which are encountered in the interactive drama systems as well as storytelling applications. This is achieved by proposing an integrated framework for deeply combining interactivity and narrative in computer games workflow. The idea is derived from the study of interactive drama, Petri nets (PN), narrative structures in computer games and game workflow activity process. The main contribution of this paper is to show how workflow management concepts can be jointly utilized with Petri nets (PN) for modeling game systems and game workflow control. The main advantages of using PN are that it copes well with branching stories and can evolve in parallel in large virtual world. The proposed idea is supported by some case study called Crazy ball 2. Further research effort is still needed for establishing more relationship between the game workflow activity process and other entertainment game applications with different graphics aspects, interfaces and contents.
