The phenomenon of"skin changing"or"skinning"in online games has attracted wide attention from all circles,with various regulatory approaches in judicial practice,including protection as audiovisual works,graphic works,compilation works,and other intellectual achievements that meet the Characteristics of works,or through anti-unfair competition law.The core value of online games lies in their synergistic expression,which is precisely what"skinning"infringes upon.From the perspective of the evolution of copyright law,the copyright protection of non-literal content of literary works and computer software offers valuable insights for the protection of online games,suggesting that protection should"penetrate the screen".To determine substantial similarity in online game works,it is necessary to distinguish between"ideas and expressions",filter out unprotected elements,and conduct a comprehensive comparison based on the type and specific content of the game works.Recognizing online games as a distinct type of work can bridge differences,promote consensus,stimulate the development of the online game industry,and reduce the judicial costs.