Complete mission "The Great Vault".

Complete mission "Blood Drive".

Win a duel.

Complete mission "Lair of the Harpy".

Complete mission "Beneath the Meridian".

Kill two or more enemies with a single sticky grenade.

Equip purple-rarity gear or better in every slot.

Complete mission "Hostile Takeover".

Unlock 10 Character Heads or Skins.

Tip Moxxi.

Kill an enemy, knifing them with a gun blade.

Reach level 25.

Changed all four party members to jobs different from their default jobs and won a battle.