battlefield-3
In Battlelog, the list of dog tags is split up into "Basic Dog Tags" and "Advanced Dog Tags".
So far (Rank 13) all dog tags I have unlocked were "Basic Dog Tags". I started out with the BF:BC2, the N7 and the Mass Effect 3 advanced dog tags, like everyone, I guess.
So: What are Advanced Dog Tags, and how do you unlock them?
Sometimes the game will "forget" where certain points came from, and award them under additional points.
For example, I just received 2820 additional points BUT my jet score said that I'd scored 0 that round, but I'd actually scored the exact amount that I received in my additional points. It only forgot for the after round tally, as when I checked my vehicle tab, it remembered my actual amount of jet experience (I'd levelled up).
So it seems the varying amounts may be due to for instance, it not remembering that you got a particular ribbon, or a particular service medal.
Here's a video explaining what I mean. It's pretty bad quality, but as you can see, my jet score shows up as 0 when it's tallying points, and I gain 2820 "additional points". Then later when I switch to my vehicles tab, jets has +2820 experience.
Also, as of Back to Karkand (and I'm assuming future expansions will do this too) any assignments you complete will award you 5000 "Additional Points".
Additionally, any XP earned during a double XP weekend will earn you the same amount of XP extra under Additional Points.
I can get the overlay to show up in any Origin game, but having the name be proper is another story...
Here's what you have to do, I can confirm that this works for me (the overlay showed up in-game):
If you change "Origin" to "Battlefield 3" in the Steam Shortcut, it'll show up as such in your friends list. However, this means every Origin game will show up as Battlefield 3.
Credit to this reddit post.
Best Answer
If you scroll over them you can actually see the description of each tag and how to get them