Information processing system, terminal device, computer-readable non-transitory storage medium, and information processing method

An information processing system, comprising:

• one or more server devices configured to function as a second platform, the second platform being configured to provide a second game to a second user having a second account;
• and
• one or more terminal devices,
• wherein the one or more terminal devices are configured to transmit, to the second platform, information concerning the second account of the second user,
• wherein the second platform is configured to transmit an authenticated identifier of the second user to the one or more terminal devices, the authenticated identifier being authenticated by using the information concerning the second account, and
• wherein the one or more terminal devices are further configured to:
• transmit the authenticated identifier of the second user to a first platform, which is configured to provide a first game to a first user having a first account in the first platform and also to provide the first game to the second user, and
• start the first game provided to the second user by the first platform, wherein the first game is provided by the first platform using a specific identifier that is generated by the first platform in response to receiving the authenticated identifier of the second user and that is stored by the first platform in association with the authenticated identifier.

A terminal device, comprising:

• a communication unit;
• and
• a control unit,
• wherein the communication unit is configured to communicate with one or more server devices that are configured to function as a first platform the first platform being configured to provide a first game to a first user having a first account in the first platform and also to provide the first game to a second user having a second account in a second platform, and
• wherein the control unit is configured to:
• transmit a user authentication request using information concerning the second account to the second platform, which is configured to provide the second game to the second user having the second account;
• transmit, to the first platform, an authenticated identifier of the second user, the authenticated identifier being authenticated by the second platform in response to the user authentication request;
• and
• start the first game provided to the second user by the first platform, wherein the first game is provided by the first platform using a specific identifier that is generated by the first platform in response to receiving the authenticated identifier of the second user and that is stored by the first platform in association with the authenticated identifier.

A computer-readable tangible non-transitory storage medium comprising executable instructions that, when executed, cause a terminal device to perform:

• a step of communicating with one or more server devices that are configured to function as a first platform, the first platform being configured to provide a first game to a first user having a first account in the first platform and also to provide the first game to a second user having a second account in a second platform;
• a step of transmitting a user authentication request using information concerning a second account to the second platform, which is configured to provide a second game to the second user having the second account;
• a step of transmitting, to the first platform, an authenticated identifier of the second user, the authenticated identifier being authenticated by the second platform in response to the user authentication request;
• and
• a step of starting the first game provided to the second user by the first platform, wherein the first game is provided by the first platform using a specific identifier that is generated by the first platform in response to receiving the authenticated identifier of the second user and that is stored by the first platform in association with the authenticated identifier.

An information processing method performed by a terminal device, comprising:

• a step of communicating with one or more server devices that are configured to function as a first platform, the first platform being configured to provide a first game to a first user having a first account in the first platform and also to provide the first game to a second user having a second account in a second platform;
• a step of transmitting a user authentication request using information concerning the second account to the second platform, which is configured to provide a second game to the second user having the second account;
• a step of transmitting, to the first platform, an authenticated identifier of the second user, the authenticated identifier being authenticated by the second platform in response to the user authentication request;
• and
• a step of starting the first game provided to the second user by the first platform, wherein the first game is provided by the first platform using a specific identifier that is generated by the first platform in response to receiving the authenticated identifier of the second user and that is stored by the first platform in association with the authenticated identifier.