The launch trailer for Borderlands 2's Tiny Tina's Assault on Dragon Keep has just arrived, giving us a look at the role-playing goodness to be found in the game's final expansion.

As you see from the video above, this expansion is Borderlands 2's most outlandish one to date. In order to kill some time during an interrogation at the crew's headquarters in Sanctuary, the Vault Hunters play a game of Bunkers & Badasses with Tiny Tina, who acts as the Bunker Master.

The game plays like Dungeons & Dragons, complete with several fantasy role-playing tropes such as dwarves, dragons, spells, swords and castle areas. A nice touch is Tina's narration and the fact that you can use grenades to cast classic spells such as Fireball and Magic Missile. Perhaps the coolest addition is a shotgun that shoots exploding swords. Yup, you read that right.

Check out the trailer above to see the role-playing insanity and let us know if you're going to download this new expansion for Xbox 360, PC, and PlayStation 3. If you have the Season Pass, it's free! But if not, you'll have to shell out $10 (800MSP) for it.