The game is set on the planet Pandora, contested by bandits, mercenaries of interstellar corporations, dangerous wildlife and, eventually, eldritch alien abominations.
Gearbox released four DLC campaigns that continue the main game's story (Captain Scarlett and Her Pirate's Booty, Mr. Torgue's Campaign of Carnage, Sir Hammerlock's Big Game Hunt and Tiny Tina's Assault on Dragon Keep).