Majin and the Forsaken Kingdom

There are 8 costumes that can be collected. For this acheivement you only need to get 3 of them.

These are the costumes:

Hero's Outfits
- Traveler: Traveler's Headband, Traveler's Wristguard, Traveler's Cloak
- Guard Knight: Guard Knight Helm, Guard Knight's Gauntlet, Guard Knight Armor
- Scholar: Scholar's Hat, Scholar's Cuff, Scholar's Clothes
- Marine: Marine's Cap, Marine's Wristguard, Marine's Uniform
- Attendant: Attendant's Formal Cap, Attendant's Decorative Sleeve, Attendant's Formal Wear
- First King: First King's Crown, First King's Armlet, Cloak of the First King
- Bandit: Bandit's Hood, Bandit's Wristguard, Bandit's Costume
- Darkness: Helm of Darkness, Gauntlet of Darkness, Armor of Darkness

The Majin's Outfits
- Perfected Majin
- Guardian's Costume
- Dark Costume

Here is a collectables guide to help you get them:
http://www.xbox360achievements.org/forum/showthread.php?t=28...

Credit goes to Tyger7 @ xbox360achievements