The core of the legal disputes triggered by game mods lies in their copyrightability and work attributes. As a special type ofprogram the composition and operational logic of game mods are similar to video games thereby inheriting the copyright disputes ofvideo games. It is necessary to address the copyright disputes of video games as a preliminary step in discussing the copyright of gamemods. The composition of game mods is unique comprising both the underlying programming and the effects after the integration withthe game. Therefore when determining the copyrightability of game mods it is crucial to define the boundaries of game mods as worksbased on their added effects and degree of integration with the original game. This includes considering the originality of various gameelements such as art literature music as well as game rules and characters from multiple perspectives. Game mods lacking originalityare not considered protectable works. In exploring the originality of game mods one can refer to the “absolute originality + blocking” standard. Whether a game mod constitutes a derivative work should be analyzed based on a combination of objective comparisonand subjective perception.