Final Fantasy and Deus Ex publisher Square Enix says unknown parties may have gained unauthorized access to one of its servers in a hacking attempt that has reportedly affected 1.8 million people.

The server in question contains information on the free Square Enix Members service offered in North America and Japan. Square Enix suspended operation of the service on Monday, Dec. 12 after learning of the hacking attempt.

After conducting an investigation into the intrusion, Square says no user login credentials were accessed. “Moreover, we have not found evidence that the individual was able to access any personal information at all,” the company said in a note on the Square Enix Members website.

Square has notified the Japanese government of the attempt and says an email will be sent out to all service members advising them that the incident took place.

The Square Enix Members service will be down for a few more days while the company conducts a broader internal investigation.

This is the second time this year Square Enix has fallen victim to a hacking attempt. Back in May, and other Square Enix-owned websites were allegedly broken in to and around 350 job resumes and 250,000 email addresses were illegally obtained.

VentureBeat has attempted to contact Square Enix to confirm the number of Members users affected and to get an exact ETA on when the service will be restored.