Sega Fave, a Sega Sammy Holdings subsidiary based in Shinagawa Ward, Tokyo, said on November 2 that some of its servers had been accessed without authorization by a third party. The company has suspended related services since 3 p.m. on November 1, leaving some arcade game online services and new SEGA ID registrations unavailable.
The affected systems include ALL.Net, which connects arcade machines in game centers to a network, and Aime, a user authentication system that identifies players through IC cards and other means and manages their play data. As of 6 p.m. on November 2, players could not play ALL.Net-compatible titles online, view participating store information on official sites, or use the ".NET" services for each title.
Gameplay using Aime or the smartphone service PrizeON is also down, along with Sega Lucky Kuji Online and new SEGA ID registrations. The disruption continued as of 1 p.m. on November 4, and multiple game centers have reported on X that some machines are out of operation or have limited functions.
Bandai Namco titles affected
The impact has reached games from Bandai Namco Experience in Minato Ward, Tokyo, which uses ALL.Net. Eight titles are affected, including Taiko no Tatsujin, Mario Kart Arcade GP DX and Mobile Suit Gundam Extreme Vs. 2 Infinite Boost. Taiko no Tatsujin and Mario Kart machines will become progressively unusable offline as well as online, according to the company. The effects differ by title.
Sega Fave is investigating whether information leaked and how far the impact extends. Its initial investigation has found no confirmed leak of customer or business partner information.
The company expects the investigation to take some time. It will announce on its official site and elsewhere once the investigation and safety checks are complete and services are cleared to resume.