WoP has medals which can only be achieved by doing certain things in battle.
Get 2 frags in less than 3 seconds in between frags.
PadKiller (SnackAttack) Edit
Frag someone with the punchy
Capture the Flag/Lolly
Spray 5 logos without leaving the Spray Room
Spray 8 logos without leaving the Spray Room
You can read more about all these in-game by pressing the Help key