Sony said on Tuesday that its popular PlayStation Network got hacked, forcing the company to take down the service.
Sony says it is not clear that the hackers got the credit card information of any of its customers, but said it was turning off the entire service while it investigated.
"We have discovered that between April 17 and April 19, 2011, certain PlayStation Network and Qriocity service user account information was compromised in connection with an illegal and unauthorized intrusion into our network," Sony said in a statement.
"Although we are still investigating the details of this incident, we believe that an unauthorized person has obtained the following information that you provided: name, address (city, state, zip), country, email address, birthdate, PlayStation Network/Qriocity password and login, and handle/PSN online ID," the company told customers.
"It is also possible that your profile data, including purchase history and billing address (city, state, zip), and your PlayStation Network/Qriocity password security answers may have been obtained."
Sony urged its customers to check their credit status with online report services such as Experian.
Sony's PlayStation network can be used to play video games online, watch TV, or rent movies. It is used by about 77 million users and the company announced at the end of March that it had sold 50 million of its latest PlayStation 3 consoles.
The system has been down for nearly a week as Sony dealt with the problem. Users are expected to be able to access the networks again within a week.
The attack came as Sony rolled out several new high-profile games and the company's stock has taken a hit.