Sega has warned that the Sega Pass network of sites, which includes its gaming forums and press resources websites, has been hacked.
The gaming company revealed the hack on Friday by sending an email to registered members. It reassured users that no payment information had been compromised as it uses third-party payment providers to handle transactions.
"Over the last 24 hours we have identified that unauthorised entry was gained to our Sega Pass database," the email said. "We immediately took the appropriate action to protect our consumers' data and isolate the location of the breach. We have launched an investigation into the extent of the breach of our public systems."
The company said that the information obtained included email addresses, dates of birth and encrypted passwords. It re-iterated that none of the passwords obtained were stored in plain text.
The hack is the latest in a recent trend to centre on gaming companies. Sony has been the victim of repeated attacks to its gaming network and websites. In June, Nintendo also said it had been hacked.
Update: The LulzSec hacker group has offered to help Sega find the hackers responsible.
"@Sega - contact us. We want to help you destroy the hackers that attacked you. We love the Dreamcast, these people are going down," LulzSec posted on Twitter on Friday.