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If you DO NOT have an Internet connection on the PC where you installed GTA: Episodes From Liberty City, you will need to perform a 'Manual Activation', and possibly an offline 'Date Check' to activate your game.Offline 'Date Check and Product Activation' Guide If you need help for any of the topics listed below, please click on the LINK provided in each section below. Here you will find information regarding game activation, revoking a previous activation, and further details and support regarding this system. This support site provides information about Grand Theft Auto Episodes From Liberty City PC.