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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?
Price history tracked since Jul 8, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
How it worksTracked since Jul 8, 2026.
Steam Train Fest ends
Official stores with direct support.
Third-party resellers. Often cheaper, without official store support. Keyshop prices vs Steam →
This is the base game required to play this DLC. Other expansions may also be required.
Other games from the same series.
Lowest tracked price: $8.39 (Jul 14, 2026) · current best: $8.39 across 3 stores.
25% positive reviews all-time.
Right now the cheapest offer for Borderlands: Mad Moxxi's Underdome Riot is $8.39 at GameBillet. KingsPrice compares 3 offers from 3 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for Borderlands: Mad Moxxi's Underdome Riot is $8.39 (recorded on Jul 14, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Keyshops are marketplaces that resell game keys, usually below official store prices. The keyshops listed on KingsPrice deliver genuine Steam keys, but buyer protection differs from official stores — check the shop's rating and refund policy before buying. You can hide keyshop offers at any time with the keyshops toggle. Keyshop prices vs Steam →
Create a free price alert on this page and KingsPrice will email you when Borderlands: Mad Moxxi's Underdome Riot drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
