Reached level 25

Completed the mission "Rising Action"

Tipped Moxxi $10,000

Killed a Constructor without it ever building another bot

Completed the mission "A Dam Fine Rescue"

Purchased 5 items from the black market

Completed the mission "Hunting The Firehawk"

Revived someone from "Fight for Your Life!" that is on your friends list

Completed the mission "Plan B"

Completed the mission "The Road To Sanctuary"

Reached level 5

Complete the Final Day, in either Single or Multiplayer, and finish the game