Gearbox Software announces two different tiers of collector's edition for Borderlands 2, their role-playing shooter sequel that's expected this September. The Borderlands 2 Pre-Order Page offers links to the retailers offering the CEs and a bunch of photos of all the goodies included in these CEs, which include membership in a Premiere Club, similar to how they did with Duke Nukem Forever. Here's the deal:

The Deluxe Vault Hunter’s Collector's Edition (MSRP $99.99) includes a copy of Borderlands 2; authentic Marcus Kincaid bobblehead; Inside the Vault: The Art & Design of Borderlands 2 hardbound book; collectable sticker set; map of Pandora; digital comic download code; and bonus downloadable in-game digital content. The Ultimate Loot Chest Limited Edition (MSRP $149.99) includes all of those items, plus a collectable scaled replica of the red loot chests found throughout Pandora in Borderlands 2; steel book case; Creatures of Pandora wide-format ID chart; lithograph postcard set; field notes from Sir Hammerlock; cloth map of Pandora; and a numbered certificate of authenticity. Both of the special editions will be available for the Xbox 360® video game and entertainment system from Microsoft, PlayStation®3 computer entertainment system and Windows-based PC.

Gamers who pre-order the Deluxe Vault Hunter’s Collector's Edition, Ultimate Loot Chest Limited Edition or the standard edition of Borderlands 2 from participating retailers will also gain access to the Borderlands 2 Premiere Club, allowing them to download the Gearbox Gun Pack, a Golden Key, the Vault Hunter’s Relic and an all-new fifth character class - the Mechromancer. The Gearbox Gun Pack is a collection of unique guns to help players begin their journey on Pandora. The Golden Key is used to unlock a rare in-game item in the mysterious Golden Sanctuary Loot Chest found in Borderlands 2. The Vault Hunter’s Relic is an in-game item that boosts players’ gear-hunting fortune while playing solo or teaming up with friends. The Mechromancer character class will be available following launch when development of the character is complete and is free to those who pre-order Borderlands 2, and will be available for purchase for those who do not.