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!

Cataclysm Expansion III Has been released 5/12/2018!



Town Crier

Patch 20 Deploys on Cataclysm!

It's a feature release on Cataclysm! We've added two new automated events, and have a few more fixes and features as well! See the news on the forums here: Patch 20 Notes

Expansion Client is now available!

We have a new client full of features, nostalgia, and expanded content! Players are required to either download the new installer, or update their existing client files! Please use the download links above, or see more information on the forums here: Client Update.

Power Hour Weekend has begun!

We're starting our first Power Hour weekend! You will have double skill gain, double gold drops all weekend! It will automatically enable and remain active all weekend, please enjoy!

Expansion Patch 18 is released!

We've put the finishing touches on PvP, it's the one everyone's been waiting for! Our expansion release is gearing up! See the details on the forums here.

Super Sunday Events! 1/17/16 at 9:00AM PST (GMT -8:00)

We'd like to invite all players to come to our events this Sunday! We have a full line up in store for you. Join us at 9:00AM PST (GMT -8:00) and win prizes! Events for new players as well, come see!



→ Download Installer ← (Required)
Server: login.cataclysmuo.com 
Port: 2593




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