Following a span of a number of hours yesterday when owners of the PC version of Assassin’s Creed 2 and Silent Hunter 5 couldn’t play due to problems with Ubisoft’s DRM authentication servers, the company now says the server problems were the result of hacker attacks — attacks that are evidently still ongoing. As of this writing, Ubisoft’s official Twitter account reports the DRM authentication servers are once again under attack, locking some gamers out of their perfectly legally owned games.

An earlier tweet on their account attributed yesterday’s outage to hackers as well, saying “Servers were attacked which limited service from 2:30PM to 9:00PM Paris time [8:30AM to 3:00PM EST].” Now, a tweet that was posted about two hours (again, as of this writing) says that “Our servers are under attack again. Some gamers are experiencing trouble signing in. We’re working on it and will keep you posted.”

Yet another earlier tweet claimed that “95% of players were not affected” by yesterday’s server outage, with only a “small group of players” receiving denial of service messages when trying to play Assassin’ Creed 2 or Silent Hunter 5.

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4. Ubisoft Domain Registrations Hint at Assassin’s Creed, Driver Titles
5. Influx of Halo Reach Players "Hammering" Bungie’s Servers