The Borderlands 2 Season Pass includes four all-new add-on campaigns featuring new areas to explore, new adventures to undertake, new enemies to overcome and the Ultimate Vault Hunter Mode Upgrade Pack in a bundle that's available at a discounted rate over buying each add-on individually.
The Borderlands 2 Season Pass does not include the Mechromancer, as many of our fans will be receiving her as a free download because they pre-ordered Borderlands 2 from a Premiere Club retailer and we don't want those that already have a free download of her to pay for something they already have.
For those who aren't members of the Borderlands 2 Premiere Club, the Mechromancer is available as premium downloadable content for $9.99 / 800 Microsoft Points.