In this demo, we present an immersive virtual reality (VR) system which integrates multimodal interaction sensors (i.e., smartphone, Kinect v2, and Myo armband) and streaming technology to improve the VR experience. The integrated system solves the common problems in most VR systems: (1) the very limited playing area due to transmission cable between computer and display/interaction devices, and (2) non-intuitive way of controlling virtual objects. We use Unreal Engine 4 to develop an immersive VR game with 6 interactive levels to demonstrate the feasibility of our system. In the game, the user not only can freely walk within a large playing area surrounded by multiple Kinect sensors but also select the virtual objects to grab and throw with the Myo armband. The experiment shows that our idea is workable for VR experience.