OK-- They are not all for games, only the 1st line is "only" for games. The rest have games in them also. It says 2010 because that is the KDE you are using, remember we are a rolling release, so they only change the numbers when they do a major update. When you update to the latest KDE 4.8.3 they will then say 2012.
Not sure why they all have the 404. Normally means it is off line for a bit. Give it a couple hours and check again.