PREMIUM DOG TAGS

[Update] how you might get BF4 or other steam games for free 

Battleifield 3 Premium EVERYTHING will be relased + EXTRA CONTENT

Here is what you can expect from Battlefield Premium:
20 new maps (across all 5 DLCs)
20 new weapons (across all 5 DLCs)
More than 10 new vehicles (across all 5 DLCs)
More than 4 new game modes (across all 5 DLCs)
More than 30 new Assignments (across all 5 DLCs)
More than 20 new Dog Tags (across all 5 DLCs)
World premier: 6/4/2012 at 1:00 PM (PST) / 9:00 PM (UTC) - @ E3 Press Event
EARLY ACCESS TO ALL FUTURE DLC CONTENT

Source

All Battlefield 3 Dog Tags 401 Dog Tags