Question: Do I need a Social Club account to play L.A. Noire? How do I sign in and out of different profiles? How do I create an offline account? If I choose to play on an Offline Account now, can I upgrade later to a full Social Club account without losing any progress?
Answer: A Social Club profile is required to play L.A. Noire and save progress.
On the Title Screen, you will have the option to sign in to an existing Social Club account or create a new account. If creating a new account, you can choose whether to register an online Social Club account or create an Offline Profile. Note that a full Online Social Club Profile is required in order to access certain game features such as online Social Club statistics, achievements, and Ask the Community.
To sign in or out of different profiles, access the Social Club screen from the Main Menu. Click on the current profile in the upper-right and observe the commands in the drop-down menu, such as Sign Out.
At this time, there is no way to migrate from an Offline profile to an Online-Enabled Social Club account.