Complete the following tasks to unlock Disney Gamer achievements.

Living Oraculum: Unlock every chapter
Puzzle Master: Find every map piece and explore all map locations
Rushed Rabbit: Defeat 50 enemies using McTwisp's Slow Down ability.
Savior of Underland: Defeat the Jabberwocky.
Weird, Wise, Malicious: Get the remaining three characters in your party.