Total War: Shogun 2 - Blood Pack DLC

Summary pulled directly from Steam - Some text may only be applicable to Steam platform

The Total War battle engine has been re-engineered for the ultimate in visceral conflict. Intricate new animations enable your Samurai to carve a bloody, limb-strewn path through enemy armies.
The Total War: SHOGUN 2 Blood Pack features new visual effects during real time battles:

Decapitation and limb severing
Blood effects on unit models, equipment and ground
Blood-squirt from projectile and weapon impact
New sounds for dismemberment and spurting blood
Blood-spatter effect on camera

The Blood Pack visual effects can be turned on and off from the game Options menu.