Abstract: A game device, such as a game console or a PC, is authenticated before joining an online gaming session. When the device registers with the gaming service, the device is queried for its system type (e.g., XBOX®, XBOX® 360, and PC) and a device identifier (e.g., serial number). The first time the device registers with the gaming service, the devices system type and identifier are stored. Each subsequent time the device registers with the gaming system, the device query response is compared with the stored system type and identifier. If the system type and identifier match, the device is allowed to participate in the game session. Additionally, the device system type is analyzed to determine if the device is allowed to participate in the game session. For example, a PC would not be allowed to participate in an XBOX® only game session.