DICE has included an Easter Egg in their Battlefield 4: China Rising DLC, which allows users to complete an assignment called “Phantom Prospect” and unlock a unique dog tag.
The assignment is tucked away on the Battlelog, and players must use a bit of trickery to unlock the requirements needed to fulfill the assignment. The YouTube below, details the exact method to unlock the Phantom Prospect Dog Tag.
You’ll need to to get 200 kills with an Assault Rifle, 200 kills with a Battle Tank, and a 300m headshot.
Battlefield 4 Phantom Prospect Unlock