Britannia’s Great Library
¶ The Codex of Ultimate Wisdom❦
The Codex is our great wiki of Ultima Online — 18,148 folios on skills, items, creatures, dungeons, quests, and the histories of Britannia, gathered from the chroniclers' archives and synthesised into a single illuminated tome. Every folio is searchable, cross-linked, and bound under candle and quill.
Enter the Codex ›Skills of the Realm
The 58 skills — Magery, Tactics, Tailoring, Imbuing, Animal Taming — with formulas, training paths, and masteries.
Magic & Magery
Sixty-four Magery circles plus Necromancy, Mysticism, Chivalry, Spellweaving — every spell with reagents and damage.
Crafting & Trades
Twelve crafting trades, the Reforge → Imbue → Enhance workflow, BODs, and the ore & wood tier matrices.
Combat & Damage
Tactics, Anatomy, the damage formulas, weapon special moves, slayers, and the resists table.
Britannia & Lore
Seven facets, the eight cities of Virtue, the dungeons, and the chronicle of Lord British's realm.
Publishes & Patches
Every Publish from 1997 to Publish 123, with cross-references to the folios each one touched.
¶ Instruments of the Realm❦
Imbuing Calculator
Plan armor, weapons, jewelry & shields. Calculates weights, materials, and mod-slot pressure.
Open the calculator ›Damage Calculator
Effective damage, DPS, slayer bonuses, consecrate, and weapon rankings against your character stats.
Open the calculator ›Template Builder
Full character spreadsheet — skills, stats, and equipment properties with auto-tallying totals and shareable links.
Open the builder ›¶ Latest Publishes❦
- 2026-05-13 Publish 123 Publish 123
- 2026-02-10 Publish 122 Publish 122
- 2025-10-14 Publish 121 Publish 121
- 2025-06-17 Publish 120 Publish 120
- 2025-02-25 Publish 119 Publish 119
¶ Companions of the Realm❦
Official Britannia
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UO.com
Official Ultima Online — download the client and play free.
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UO Wiki (uo.com)
Official player-maintained wiki — game mechanics, items, and Publish notes.
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ClassicUO Web Client
Play Ultima Online directly in your browser.
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Official UO Discord
Chat with players, get help, stay updated on events.
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Official YouTube
Live streams and engaging content by Fenneko.
Community Chroniclers
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UO CAH
Recommended
Currently the best-maintained companion — in-game events, the Animal Bestiary, and tamer calculators.
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Stratics
Long-running UO community — guides, builds, and discussion archives.
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UOGuide
Comprehensive UO encyclopedia — skills, items, creatures, and systems.
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The full compendium
More tools, guides, and curated entries ›
¶ The Old Forum, Preserved❦
The community at forum.uo.com is no longer active, but the archive lives on here in full — every thread, every reply, fully searchable.
8,628 discussions · 111,395 posts · 10 categories
- General Discussions 7,100
- ClassicUO Web Client 28
- Customer Service 2
- Homes & Castles 244
- New Legacy 321
- PvP / VvV 251
- Roleplay 184
- Skills and Stats 465