Sony Corp. is investigating the outage of its PlayStation Network, a system that links gamers in live play worldwide.
The company first blogged about the outage Wednesday, and on Thursday said it could take a "full day or two" to get the service back up and running. It did not indicate what it believed to be the cause of the outage.
Posts on a PlayStation message board on Friday afternoon indicated the system was still down.
Sony representatives did not return messages left seeking comment.
The outage comes just after Tuesday's release of the game "Mortal Kombat," which is available on the PlayStation 3 and Microsoft Corp.'s Xbox 360. It also comes as Amazon.com tries to restore computers used by other major websites as an outage stretched beyond 24 hours.
Explore further: Best Buy rolls out mini-shops for Samsung appliances