Achievements and trophies in the PC and PS3 versions of Borderlands 2 hint at a new piece of downloadable content called "Captain Scarlett and Her Pirate's Booty". Gamers on NeoGAF and other big message boards are reporting the details.
Treasure Hunter - Completed the mission "X Marks the Spot"
Gadabout - Discovered all named locations in Oasis and the surrounding Pirate's Booty areas.
Completionist - Complete all Pirate's Booty side missions.
Folks posting on the Gearbox forums have also discovered some details via files in the PC version:
- Each class gets a new head.
- New rarity level? (Level 6, "Seraph")
- New items/weapons. (such as the Blood Relic, Anshin Evolution Shield, Scarlet's Greed, 12 Pounder, Little Evie, Stinkpot, and more!)
- Lots of bosses and multiple raids (3)! (such as Scarlett, the Leviathan, Hyperius the Invincible, and Master Gee the Invincible)
- Covering someone in condiments!
Here's a (spoilerific!) dump of all the files.