Survive the Train Sequence

Stomp 10 Containers

Dismember 25 Necromorph Limbs (single player only)

Defeat an enemy by throwing an object at him while he’s already down.

You've cleared Final Chapter.

You've acquired S Rank in "Battle Between the Sage God".

You've cleared Chapter Five.

You can now use Sasuke, Suigetsu, Karin and Jugo.

You've cleared Chapter Two.

You've picked up 500 items.

You can now use Kakashi, Yamato, Guy and Asuma.

You've cleared Chapter One.