Cut down 100 enemies with Steel on Bone attacks.

3 Tyrants Killed (lifetime)

Achieved "Surprise!" ending.

Completed the "Digging up the Past" side quest.

Escape from the monorail.

Learn the Flying Bird Flip.

Attempt "The Rescue" and survive.

Fully upgrade all abilities for one character class.

17 Hunters Killed (lifetime)

Heal with 101 Green Herbs (lifetime)

Complete the fourth mission of the U.S.S. campaign.

Kill 5 enemies with Blood Frenzy in a single campaign game or multiplayer match.

Completed the game on the hard puzzle difficulty setting, any ending.