You were successfully promoted up a rank in multiplayer.

Do a 1080 spin and land successfully

Win the Range Tour

Successfully defend yourself with your shield 20 times

Win an action race without firing any weapons

Hit 20 opponents with weapons dropped as secondary weapons

Use all the weapons in the game

Create a kart in Kart Studio

Create a Mod in Mod Studio

Kill a Juggernaut in Special Ops.

Completed "Reilly's Rangers"

Completed "Free Labor"

Played in a co-op game with either an employee of Gearbox or someone who had this trophy