Use a Golden Key.

Unlock 10 Vehicle Parts via hijacking.

Win a live grenade at a Slot Machine.

Equip purple-rarity gear or better in every slot.

Kill an enemy, knifing them with a gun blade.

Complete mission "Lair of the Harpy".

Complete 20 Side Missions.

Complete mission "Atlas, At Last".

Complete mission "Hostile Takeover".

Complete mission "Taking Flight".

Complete mission "Children of the Vault".

Found a certain weapon before getting a sword. (Page 38)

Made 15 wishes