Welcome to UO Cataclysm

Marketplaces reminiscent of a lost era..

The Frost Elf Den, a dangerous destination for an adventurer.

Custom crafting includes weapons, armor, potions and more!

Lively towns centered on a bustling economy.

Rare custom mounts can be tamed only by the brave.

Perilous journeys into our dungeons await.

Static houses are available for your RP pleasure.

PVP in our custom duel pits where you can risk it all!

Custom Mob Locations with Storylines Around the World.

UOCataclysm is a perfect blend of the best of Sphere 51a, T2A and what many of us consider the 'golden age' of Ultima Online. UOC has spared no expense to design a server which functions with all of the greatness of the original Sphere but powered by RunUO. Be apart of a rich, custom world with a unique flair and quality the most nostalgic can appreciate. Finally a server you can enjoy that lives up to its promises on being true to the original Sphere playstyle!

UO Cataclysm Expansion II has been Released!


Town Crier


Super Sunday Event Schedule! 1/9/16 @ 9:00AM PST (GMT -8:00)

We have a full line up of fun events this weekend! We will have ones that new players and veterans can both enjoy! Please join us at the Safe Zone at 9:00AM PST as we kick off the new year with some fun in Britannia. See you there!


New Marketing efforts on Reddit, be apart of it and be rewarded!

Cataclysm has been experiencing rapid growth and you can help bring more players as well! We have a new thread on reddit, based on our statistics this is one way to bring a heavy volume of traffic to the website. I'd like to encourage everyone to upvote the thread and post a comment as well. If you use your player name in the comment, I'll reward you with a nice item in game! Again, thank you all for your support. See the thread here: https://redd.it/3xda83


Cataclysm Turns 1 Year Old! Special Events! 12/13/15 @ 9:00AM PST (GMT -8:00)

We are happy to have reached our one year milestone and to celebrate we will be having a very special Super Sunday! We're hosting events with good prizes and participation prizes for all. We're giving out a very special reward to all those who log in and support Cataclysm! Without you we couldn't do what we love to do, thank you very much for your support!

Come play our events starting at 9:00AM PST, 12:00PM EST.


Super Sunday Events this weekend! 11/15/15 @ 9:00AM PST (GMT -8:00)

We're having a busy weekend here at CUO! We will be having three events this weekend with rare prizes, and participation prizes to all! We're looking forward to it. For more information please reference the forums.


Super Sunday Events this weekend! 11/8/15 Starting 9:00AM PST! ( GMT -8:00 )

Large lineup of events this Super Sunday. 1v1 Tournament, Bomberman, and Britannia Burns! All tournament participants and spectators will receive a rare prize! Good prizes for event winners! For more information, see the forums.

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