Server issues are plaguing the new PC sandbox, with both online and singleplayer directly affected. Fortunately Uplay can be set to work in an offline mode, so the campaign is playable.
"We're very sorry for the server issues affecting Far Cry 3 on PC and are working as fast as possible to restore the service," Ubisoft as an apology.
discovered the fact that Uplay can be told to go offline and so launching Far Cry 3 is fine, but the rather annoying fact is that Uplay by default doesn't tell you that an offline is available if the service is having connection issues. Instead you're left thinking it's completely unplayable until the servers are fixed.
Far Cry 3 releases on Xbox 360, PS3 and PC today in the UK.