This thesis deals with the conception and implementation of a prototype emulator software that can be used to play a broad range of Game Boy games on a conventional desktop computer. The development of such an application is a technically demanding task defined by various challenges such as the correct interpretation of machine instructions, graphics emulation, as well as playability and correctness. As there is no accessible official documentation of Game Boy hardware, the emulator was developed based on the knowledge amassed by Game Boy reverse engineers. Nevertheless, an emulator was developed that can already run a large selection of games. The correctness of the implemented components was verified using dedicated test programs.