Day to day world becomes a more digital. Virtual reality is superimposed over real world. The virtual means “being something in effects, though not in actually or in fact”. The term “virtual” has been used in the computer sense of “not physically existing but made to appear by software” since 1959. In virtual reality software generated realistic images with the virtual scenes make a feel of real word and user are totally involved in this world is called “immersion” and user start “interaction” with virtual world. “Immersion” and “Interaction” are the important parts of virtual reality.

Keywords : Virtual Reality (VR), Immersion, Head Mounted Display (HMD),FPS(frame per Seconds), 3 Dimensional (3D).