Ultima Prime
Ultima Prime is a term used by some players for the Ultima single-player games upon which UO is based, and the fiction that underlies them.
In Ultima I, the Gem of Immortality - which contained a complete copy of Sosaria - was splintered into Shards in order to defeat Mondain. The original "Prime" world continued on its pre-ordained course (the single-player games), whereas life on the Shards continued along without the Stranger (who destroyed the gem).
However, as various events (such as the Magincia Invasion) have shown, we cannot escape our fate forever...
In Ultima II, the Stranger was again summoned from across the void to battle Minax, Mondain's Apprentice.
In Ultima III: Exodus, Stranger returns to Sosaria to find the world much changed from the last visit- both in the amount of time passed, and the reformation of the contenents. This time, a new evil threatens the land: Exodus, the prodigy of Mondain and Minax's dark magic. Or, is Exodus a hellish combination of science and sorcery?
In Ultima IV: The Way of the Avatar, Stranger returns to Sosaria to find that with the destruction of Exodus, the world was once again devastated- Islands rose and sank; fertile plains became desserts; and the formation of the continent was again drastically altered. Coming out of the Dark Ages of Mondain, Minax, and Exodus, Lord British is searching for a new moral code to unite his people. Becoming a paragon of the 8 Virtures, and their 3 Principles, the Avatar braved the darkest dungeons, and ripped the Codex of Ultimate Wisdom from the depths of the Abyss- thus bringing an age of enlightenment to Lord British’s realm.
Ultima V: Warriors of Destiny finds Britannia in crisis! Lord British is missing, and Lord Blackthorn is acting as regent king. Only, something is amiss with the new regency. Blackthorn has converted the original Virtues, and now they offer something darker, something more self-serving. The Avatar discovers that when the Codex was ripped from the depths of the Abyss, immense underground caverns were created, thus exposing three shards from the corrupt Gem of Immortality. These shards eventually possessed three people, and transformed them into the Shadowlords—the maligned influence behind Lord Blackthorn’s rule and Lord British’s kidnapping.
Ultima VI: The False Prophet finds the Avatar in mortal peril. Typically, when the Avatar traveled across the void, it was through a Blue moongate—this time, when the Avatar is pulled to Britannia, it is through a Red moongate. Not only is the gate different, but the arrival local is too! The Avatar was summoned to some sort of demonic sacrificial altar. Iolo, Shamino, & Dupre arrive in the nick of time, and rescue the Avatar- gating back to Lord British’s castle. The Avatar once again learns of massive destruction- when Lord British was rescued from the Underworld, massive earthquakes struck the land, and the subterranean catacombs collapsed upon themselves. Now, Britannia and its Shirnes of Virtue are being overrun by Gargoyles. It was they who tried to sacrifice the Avatar! Unbeknownst to Lord British and the Avatar, the Codex of Ultimate Wisdom used to be the Gargoyle’s sacred text- which was stolen from the Abyss; and, when the subterranean catacombs collapsed- they collapsed on top of the Gargoyle city states! The Avatar may have been a savior for the land of Britannia- but, was also a destroyer of the Gargoyle race! And now, a time of reckoning has come.