Save a Buddy from captivity

After taking control of the enemy transport in Act 2-2, do not let a single enemy escape.

Complete the Triple Decker Tank Engine adventure.

Complete the Gilded Steam Ship Adventure.

Defeat a monster in combat with a friend by your side.

Complete Act 1.

Beat the fourth boss.

Beat the first boss without dying.

Wield the knife in single player or co-op mode.

Defeat the first level boss.

Kill an enemy.

Complete World 1 in Story Mode