At the dawn of computer games at the beginning of 1980s, game graphics expressed in 2D started to evolve, incorporating Japanese animation techniques. Since the 21st century, game graphics have developed as well as hard and software, using 3DCG technology. We have now entered the era of VR (Virtual Reality) and MR (Mixed reality) today. In the process of evolution, the task of creators has always been how to achieve high-standard animation. Game creators have been trying to provide aesthetic animation within the limit of hardware technology. Firstly, I will consider its process and history. Secondly, I will discuss the close relationship between animation and elements of “play” which is the origin of games. Finally, I will describe animation expressions peculiar to games.