True Vault Hunter Mode
Complete Normal difficulty story mode.
Free Golden Keys!
Right click notepad and select "Run as administrator"
From notepad click Open and find
"C:/Program files/2K Games/Borderlands 2/DLC/POPremierClub/Lic/W illowDLC"
Edit "+numkeys=1" Turn it into "+numkeys=255"
Save and open Borderlands 2 and now you have enough keys to spend for a lifetime!
Minecraft enemies and outfit
In the Caustic Caverns underneath Sanctuary, near the furthest edge, there is a shallow incline. If you go along the left-most cliff beside the incline, you will find Minecraft blocks. Breaking them will lead into an area with creepers from the Minecraft games, a golden ore block with a normal outfit, and a special outfit for defeating the creepers.
Carry one more item in your backpack
You must have 2 class mods for this to work. Once your backpack is full, switch your currently equipped class mod for another one in your backpack (you can then re-equip your original class mod after you've done this). Then exit the backpack menu and you can now pick up one more item and have a backpack with 28 items in it instead of maximum 27.
Captain Scarlett and Her Pirate's Booty Achievements
Completionist - Completed all Pirate's Booty side missions
Gadabout - Discovered all named locations in Oasis and the surrounding Pirate's Booty zones
Treasure Hunter - Completed the mission "X Marks the Spot"