This week — Monday, in fact — marked the 21st anniversary of the launch of Ultima Online; the grandfather of MMORPGs has been online for over two decades.

21 years ago Ultima Online changed the video game landscape forever.  Sosaria spawned a virtual world where people could adventure together and forge friendships that would last a lifetime.  Today we celebrate that legacy by wishing UO a very happy birthday and thanking all those Britannians who have left their mark on our humble virtual world.

Long live UO!

And just ahead of the anniversary, Broadsword Online Games released Publish 101 for the game to all shards globally. As the change notes for this Publish indicate, much of its content is focused on the 21st anniversary, and on changes to the Astronomy system in the game. However, Publish 101 also introduces a new — but, to single-player Ultima fans, familiar — material to UO:

Immense power surges through the creatures in Khaldun!  From whence it came remains to be discovered, but a means to combat this power has been found!

Caddellite raw materials can be obtained via mining, lumberjacking, and fishing.

Caddellite raw materials can be harvested in The Lost Lands with special Caddellite infused harvesting tools for sale by an NPC vendor outside Khaldun in Trammel (or Felucca on Siege Perilous).

There is a chance to recover a rough meteorite while harvesting.  Rough meteorites can be refined into one of several styles of polished meteorites using an oil cloth.

Metal weapons can be crafted with Caddellite materials for melee battle against the creatures in Khaldun.

Wooden weapons & spellbooks can be crafted with Caddellite materials for melee, ranged and magic battle against the creatures of Khaldun.

Tasty treats can be crafted with Caddellite materials for pet battle against the creatures of Khaldun

Caddellite Crafting can only be performed at the Khaldun Camp site.  The camp site has a full complement of crafting and adventuring services.

Congratulations to Ultima Online and the team at Broadsword on 21 years of Ultima Online. And if you’re reading this and happen to be among the cohort of UO players who lack familiarity with the single-player Ultima games, you may be interested to read up on where Caddellite first appeared in Ultima’s considerably body of lore.