Mastered the technology of Pandora

Completed all missions in the Arid Badlands

Defeated the Rakk Hive, the Vault Boss, Sledge, Krom, or Flynt in a co-op game

Discovered Headstone Mine

Killed Ned...sort of

Killed 5 Rakk in under 10 seconds

Killed 25 enemies with shock weapons

Play with at least two other players.

Killed 25 enemies with explosive weapons

Completed the "House of the Ned" mission

Killed 15 enemies with the Soldier's action skill

Killed an enemy plumber-style

Earned level 10