This issue presents eight research papers focusing on different aspects of intelligence techniques and their applications in computer games and simulations. They are extended papers from those accepted and presented at the International Symposium on Intelligence Techniques in Computer Games and Simulations that was held in Shiga, Japan on March 1-2, 2007.

The issue starts with a paper entitled gUsing Automatic Calibration with Microscopic Traffic Simulation,h which focuses on the use of a genetic algorithm for searching parameter spaces of a microscopic traffic simulation. The second paper, gOn-Line Fault Detection and Compensation of Hydraulic Driven Machines Using Modelling Techniques,h presents the use of modelling information for the fault detection of hydraulic driven machines as well as for the compensation of incipient faults. The third paper, gGeneration of Character Motion by Using Reactive Motion Capture System with Force Feedback,h focuses on animation making with reactive motion data generated from the interaction with force feedback and the virtual environment. The fourth paper, gModeling of Wood Aging Caused by Biological Deterioration,h looks into an application of an ant colony optimization algorithm to generation of wood aging patterns caused by biological deterioration.

The next three papers are related to network games. The fifth paper, gIntelligent Synchronization for Mirrored Game Servers: A Real Case Study,h examines the effectiveness of an intelligent optimistic synchronization scheme for mirrored game server architectures in real multiplayer-online-game environment. The sixth paper, gI3P: A Protocol for Increasing Reliability and Responsiveness in Massively Multiplayer Games,h presents a peer-to-peer (P2P) approach for minimizing the server bottleneck in online gaming and for increasing response and reliability. The seventh paper, gHaar Wavelets for Online-Game Player Classification with Dynamic Time Warping,h presents an application of Haar wavelet for reduction of online game players' action sequences used in player classification. Finally, the eighth paper, gDeveloping Natural Language Enabled Games in SCXML,h looks into the potential of SCXML for the game design and implementation.

As the guest editor of this special issue, I would like to express my sincere gratitude to the authors in this issue for their hard job. Special thanks go to the anonymous referees for their assistance in the review process. Finally, I wish to thank JACIII staffs for their helps in coordinating the publication of the issue.