Ubisoft will start transitioning its online services from next Tuesday, 7th February.
PC games scheduled to go dark include Assassin's Creed, Tom Clancy's HAWX 2, Might & Magic: Heroes 6 and The Settlers 7.
Mac gamers will lose access to Assassin's Creed, Splinter Cell Conviction and The Settlers.
Uplay on PC will fall offline completely, although other PC games not mentioned above will remain playable offline if already connected at least once.
Ubisoft did not mention how long the work would last.
The funny thing is that pirated version of all Ubisoft games will work without any problem.
News Source