During a second playthrough on "True Vault Hunter Mode", after the chapter "Where Angels Fear to Tread", the player can go to Claptraps Place and find an event item in the fireplace called "Geary's Unbreakable Gear" with the description "Only a brisk walk to Eridium Blight will reward the courier". The player must then travel to Mount Hellsfont, located in the northwest corner of Eridium Blight without dying, using a fast-travel station, or riding in a vehicle spawned from a "Catch-A-Ride" station. If the player is successful, they'll encounter a special enemy named Geary. If the player lets Geary attack them, he'll steal the gear and jump into the lava. This will cause three Rakks to appear and drop three loot chests, one of which will have purple gear. This is a reference to "The Lord of the Rings" book trilogy by J.R.R Tolkien, and the journey to Mount Doom.

Spoiler:After Mordecai shoots Bloodwing with a tranquilizer dart at the end of her boss fight, it is possible to shoot her after she falls to the ground. Even though she is defeated, every shot fired at her head will still count as critical hits in your Badass Ranks.

The Bane's vocal effects will still play even after lowering all of the game's volume settings.

Torgue vending machines in the Campaign of Carnage DLC all have 80085 typed into the selection box, an obvious reference to the juvenile joke of spelling the word "BOOBS" out on a calculator.

In Frostburn Canyon, an error message can be found on a monitor with a humorous message stating that the user has damaged their computer due to viewing pornography.

The full message reads: