From PC Gamer: "Ubisoft has announced that, effective September 1, it will be decommissioning the online features(opens in new tab) of a selection of older games. I've compiled a list of the PC games affected, their release dates, and what features will be removed.
"Ubisoft states that "Closing the online services for some older games allows us to focus our resources on delivering great experiences for players who are playing newer or more popular titles." I'm certainly sympathetic to that argument—I doubt there's a ton of gamers out there still playing Splinter Cell: Blacklist's online multiplayer. Additionally, the remastered versions of listed games will be retaining online features."