Completed all missions in the Arid Badlands

Killed 25 enemies with shock weapons

Equipped a class mod for your character

Discovered Headstone Mine

Sold 50 guns to a shop

Killed 25 enemies with explosive weapons

Earned level 10

Unlock all the Challenge paintings

Perform a jump and stay in the air for a second or more.

Killed 25 enemies with incendiary weapons

Discovered Skag Gully

Break the 186 mph (300km/hr) barrier, in a car not specially provided for an event.