Immersion is one of the key factor to the successful to design virtual reality(VR) including Unity3D. The quality of VR depends on the immersion into VR which is a perception of being physically present in a non-physical world. The Immersive perception is generate by surrounding the user or the game player of the virtual environment presented images, sound or other stimuli. I design libraries and packages which enable VR system to produce or provoke the more direct effect. For instance, I developed a kind of “Brain-Wave Controller” which is generally known as "Biaural beat" or "Monaural beat" in a simplified method. The function of each library is inducing the user or the game player to be extreme immersive mind state on the path to peak performance. You can handle your mind state by using this library which is able to control your brain waves. By using my libraries and packages, the degree of immersion into your Unity products can increase relatively.