Method, apparatus, computer program and recording medium for providing game service

A non-transitory computer-readable recording medium storing instructions that, when executed by a processor, cause the processor a computer to implement a content providing method in conjunction with a computer system may be provided. The content providing method may include providing a game program comprising a game module and a simulation module to a user terminal, the simulation module having same input and output functions as those of the game module, receiving play results comprising first output information of the game module and second output information of the simulation module from the user terminal, the play results are generated by the user terminal while not communicating with a server, and determining whether the a game play at the game module is played fairly based on the first output information of the game module and the second output information of the simulation module.