This product is a brand new and unused Borderlands: Mad Moxxi's Underdome Riot CD Key for Steam.

Immediately after payment, you will be sent a unique and unused CD Key which can be activated on Steam. You can collect this activation code from our Autokey page.

Simply enter your code into the Steam client (available free from steampowered.com). This will then grant you to a full digital download of the game.

How does our website work?

CJS CD Keys sell brand new CD Keys either taken directly from brand new sealed copies of the game, or sourced directly from world-leading game publishers. We source our keys in bulk directly from leading distributors and publishers, which reduces shipping costs.

This enables us to offer instant online delivery, at extremely competitive pricing.

After you receive your key, you can activate the game on the Steam client (available free from steampowered.com). After you activate the game with the Steam software, you can download the game immediately and instantly.

Benefits of buying from CJS CD Keys:

Instant Delivery

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NO shield fees - we offer a money-back guarantee within the price!

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Region Free

This product key we are selling is sourced directly from the publisher, or an official distributor of the game publisher. The key is completely region free and includes all languages. Region free means that you can activate the product code from anywhere in the world.

About Borderlands: Mad Moxxi's Underdome Riot:

About This Content

Mad Moxxi's Underdome Riot is an addon pack for Borderlands that includes a new cooperative arena game mode and a stash to store your gear.
Are you god's gift to gun fights? Think you're the best? Wanna prove it? Then help us celebrate the grand opening of Marcus Bank (a subsidiary of Marcus Corp) by killing hundreds and hundreds of people in Mad Moxxi's Underdome Riot, the only competitive arena around where your next of kin can be assured that you're coming back famous . . . or not at all. (All proceeds are kept by us)

Multiplayer options may have changed, please see the main title for more information