"Mastered the technology of Pandora"
This achievement is granted for completing the challenge "12 Days of Pandora".
The requirements are:
- 12 Combat Rifle kills
- 11 Pistol kills
- 10 Shotgun kills
- 9 SMG kills
- 8 Sniper Rifle kills
- 7 Melee kills
- 6 Critical hit kills
- 5 Explosive kills
- 4 Shock kills
- 3 Incendiary kills
- 2 Faces melted
- 1 Grenade kill
The progress towards completing this challenge can be checked in the challenges sub-page of the missions menu.
- The Xbox 360 achievement gives 30 gamerscore.
- The PlayStation 3 trophy gives a bronze trophy.
- This achievement is hidden in the Steam version of the game, and won't appear in a Personal Stats page until unlocked.
- Is a reference to the "Twelve Days of Christmas".
- (Xbox 360) There is a bug in which a player does not receive the achievement.