Go to any slot machine after the game has recently been auto saved. Play the slot machine as many times as desired. If you do not like the weapons and/or items you won, simply quit the game without saving by exiting to the dashboard using the PS button. Then, continue your saved game to still have all the money you spent on slot machine. Repeat this process as many times as desired to get better weapons and items.
Duplicating weapons, items, and money
Start a co-op game with at least one other player. Stand next to another player, and initiate a trade. Give them the desired weapons/items/money you would like to duplicate. Then, immediately quit the game without saving by exiting to the dashboard using the PS button. Since the game did not save after you traded the weapons/items/money, you will still have them, and the other player you traded them to will also have them. The other player can then give you weapons/items/money while using the same method. Repeat this as many times as desired. Note: Do not trade items near an auto save point to prevent the game from accidentally saving while trading the items.
Easy XP
After completing the "A Dam Fine Rescue" mission, you will find Sir Hammerlock inside Sanctuary offering a quest called "Mighty Morphin'", which involves taking an injector and injecting Varkid Cocoons with a special serum. Injecting the serum into a cocoon produces a Badass Varkid. Killing one yields around 1,900 XP during your first playthrough, depending on your level. As long as you do not complete or turn-in the quest, you can kill all the enemies, choose to "Save and Quit", and reload the game to have the enemies respawn. Repeat this as many times as desired.
Extra Wubs
At the title screen, press Up(2), Down(2), Left, Right, Left, Right, Circle, X, Start to unlock the "Extra Wubs" option at the "Gameplay" section of the "Options" menu. Note: Extra Wubs has no effect in the game.
Infinite Badass points
This trick requires a character with at least $3 million. Create a new character, and start a game with both characters. Have the character with $3 million as player one and the new character as player two. Have player one trade $3 million to player two. You will get an extra 167 Badass points added to your profile. Then, have player two give the money back to player one. Next, have player two leave the game. Then, have player two join the game, but first delete the character player two was using, and create a new one before joining the game. Give the new character created for player two $3 million again to get another 167 Badass points. Repeat this as many times as desired. Since Badass points are assigned to your profile and not a specific saved game file, it is possible to get an unlimited number of Badass points easily. Create a new character and have a second player join the game as a guest on controller two. Stand in front of the guest character with your main character, and keep activating a trade with each other by pressing Circle. Trades count whether you actually trade anything or not. Simply activate "Trade" without actually offering anything to still have it count as a trade. Do this 50 times to get a total of 166 Badass points. Then, create a new character and repeat the process as many times as desired. You can delete all the unwanted created characters once you are finished using this trick. Note: You can also do this with dueling. Stand in front of the guest character with your main character, and start a duel. Win the duel, and repeat the process. Fifty duel victories will result in a total gain of 166 Badass points. This can be done even quicker by setting up the controller configuration so you can keep tapping [Melee/Attack] without changing your aim at the second player.
Quickly reaching Level 50 with new character
Defeat The Warrior with a Level 50 character. When you are given the option to either kill Jack or let Lilith kill him, jump into the lava. The game will then automatically be saved with Jack and The Warrior defeated. Next, choose the "Save and Quit" option. When you choose to continue the game, you will start near Jack with the requirement to still kill him. Then, invite a character you want to easily level-up to 50. Once they have joined the game, have your Level 50 character kill Jack, wait three seconds, and then reset the system for the Level 50 character so the game cannot be saved. The new character will receive the XP given for killing Jack, but the Level 50 character's game will not be saved after killing Jack. Repeat this for approximately an hour to get the new character to Level 50.
SHiFT codes
Enter one of the following codes under your SHiFT account at https://shift.gearboxsoftware.com/home to unlock the corresponding bonus. Some codes will expire over time or number of redemptions.
3 Golden Keys: 5JWB3-3W9KZ-XJWZC-9TCJ3-THFSZ (Expires: Unknown)
5 Golden Keys: K35T3-JC993-RZTCT-ZTKTJ-HKF5W (Expires: Unknown)
5 Golden Keys: W3KJ3-CBHWZ-XJKS5-ST5JJ-JS5SJ (Expires: Unknown)
5 Golden Keys: KBCJ3-T3ZWH-XJKHC-SBW3B-FFX3X (Expires: Unknown)
5 Golden Keys: 5JWTB-SJHHJ-RS3K3-HJW33-F5RT9 (Expires: Unknown)
25 Golden Keys: KTKTT-ZSFWS-R3CHC-9BW33-3JW3H (Expires: Unknown)
True Vault Hunter mode
Successfully complete the game to unlock True Vault Hunter mode.
Ultimate Vault Hunter mode
Successfully complete the game in True Vault Hunter mode to unlock Ultimate Vault Hunter mode.