Game shoulda been called "Medal of Honour: Doorfighter" instead of Warfighter, seems you unlock gimmicky animations for door breaching more than anything else in the SP. Just about every closed door you come across has to be breached, then you enter into the room in a slowmo sequence where you have to headshot 4 enemies (and there always seems to be 4 in the room with one on his ass) to unlock another new gimmicky breaching animation. 
