The asynchronous perception is one of the critical factors in the game experience. It includes temporal asynchrony in the game elements and interaction. The aesthetic coherence is also a part of the synchronous perception. There are emerging studies on asynchronous perception as the rising of the next generation gaming platform. We conducted two studies in this paper. First, we investigated the sensitivity of human perception to the asynchronous audiovisual and analyzed how the audiovisual content affects the perception. Then, we further explored the in-game asynchronous perception, focusing on the asynchronous sound effect and background music. The result indicates that the ability to distinguish the asynchronous audiovisual is a normal distribution among the people, and the in-game asynchronous sound will reduce the overall performance and experience, especially in the tempi of the background music.