Virtual reality emphases on the construction of interactive 3D virtual environments, and how to interact with such environments through different sensory channels, such as audio, vision and gesture. Virtual Reality has many applications. The most popular one is 3D computer gaming, which is attracting a lot of attention in recent years.  This course aims at introducing advanced virtual reality techniques and their applications. In particular, it investigates the 3D computer gaming application and the game engine architectures.