Battlefield Heroes is back online after the game was temporarily taken offline after LulzSec released more than 550,000 user account details.
This information was released by LulzSec before the group decided to retire.
However, the game's official website has confirmed that the worst is over and service has been restored.
"Service has been restored on Battlefield Heroes following a short hiatus related to a security breach. Our investigation is ongoing, however it appears screen names and encrypted passwords associated with an early beta version of Heroes have been compromised.
Publisher EA said that no personal data, including credit card numbers, was compromised.
"To the best of our knowledge, it appears that no personal data was compromised - no emails, account history, credit card numbers or payment methods. Any further updates will be posted on this page. We apologize for any inconvenience."