I don't have the most stable or reliable internet connection, but most of the time it does just fine. Yet U3 have almost always caused problems whenever I wanted to play online. The connection process you go through in U3 seems like a bit of a dice roll for me, I usually have to do it 2-3 times for it to work, but after that it's all good. That's usually what happens except for today.
When it gets to the "syncing level data" part of the connection process it stops and after a while the following message appears "failed to sync level data". Now I've searched the web and it's apparently not a rare problem with the game, in fact quite a few people seem to have encountered it. The most well-known solution is to change your DNS settings to 18.104.22.168 (primary) and 22.214.171.124 (secondary) yet that still doesn't work. I have tried to play this game a couple of times today and it's just not happening!
I can't believe that a AAA game like Uncharted 3 has this kind of problems.
Anyway I just wanted to blow off some steam and in case anybody else have experienced this problem and found a different solution than the one above, I would gladly appreciate your help. :)