Many scholars have been researching on innovation theory, which there seem to be various studies and perspectives on the subject. Open innovation is the one of theory that applies to product development and it is very useful for the company to connect this theory to the real practice. This can help the company to improve knowledge for external people or other organizations and hopefully the company will gain competitive advantage in the same industry. The open innovation is used in many industries such as science, clinical and fashion etc. including game industries. Microsoft is one of the companies which also believes in innovation as it is important to them to stay innovative.