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Hand gesture recognition systems for virtual reality applications provides the users an enhanced interaction experience as it integrates the virtual and the real world object. Growth in virtual environments based upon computer systems and development of user interfaces influence the changes in the Human-Computer Interaction (HCI). Gesture recognition based interaction interface, endow with more realistic and immersive interaction compared to the traditional devices. The system enables a physically realistic mode of interaction to the virtual environment. The Hand gesture recognition system based interface proposed and implemented in this paper consists of a detection, tracking and recognition module. For the implementation of these modules various image processing algorithms as Camshift, Lucas Kanade, Haar like features etc has been employed. Comprehensive user acceptability has been considered to exhibit the accuracy, usefulness and ease of use to the proposed and implemented hand gesture recognition system. Hand gesture communication based vocabulary offers many variations ranging from simple action of using our finger to point at to using hands for moving objects around to the rather complex one like expression of the feelings. The proposed hand gesture recognition system offers intensions to traditional input devices for interaction with the virtual environments. The gesture based interaction interface being proposed here can be substantially applied towards many applications like Virtual Reality, Sign Language and Games. Though the present paper considered games as the application domain.