In TranZit, kill one of the denizens of the forest while it is latched onto you.

Investigate the jungle facility.

Complete a level with customized loadout.

Reach Sergeant (Level 10) in multiplayer Public Match.

Tipped Moxxi $10,000

Record 10 or more steals with any team in a non-simulated game.

Perform a Level 3 Super Attack

Enter Overtime!

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

Completed the mission "Data Mining"

Killed a flying enemy with a thrown Tediore weapon

Discovered all named locations in Sanctuary, Opportunity, and Lynchwood

Reached level 25