| Data | Client | Expansão |
|---|---|---|
| 24/09/1997 | 1.0.0 to 1.25.35 | Ultima Online (original game) |
| 01/10/1998 | 1.25.35b to 1.26.4j | The Second Age (+ Lost Lands) |
| 03/04/2000 | 2.0.0 to 2.0.9a | Renaissance (divison Felucca / Trammel) |
| 07/03/2001 | 3.0.0 to 3.0.7a | Third Dawn (3D client, +Ilshenar) |
| 24/02/2002 | 3.0.7b to 3.0.8r | Lord Blackthorn's Revenge (+30 mobiles by Todd McFarlane) |
| 11/02/2003 | 3.0.8z to 4.0.4b2 | Age of Shadows (+Malas, new classes Paladins / Necromancers, custom houses, 5 resistances, item insurance, weapon abilities) |
| 02/11/2004 | 4.0.5a to 4.0.11c | Samurai Empire (Tokuno, new classes Samurai / Ninja) |
| 30/08/2005 | 4.0.11d to 5.0.9.1 | Mondain's Legacy (new race Elves, spellweaving, new dungeons) |
| 27/06/2007 | 6.0.0.0 to 6.0.14.3 | Kingdom's Reborn (new client, new graphics, essentially new game) |
| 08/09/2009 | 6.0.14.4 to 7.0.8.2 | Stygian Abyss (new client, new race Gargoyles, new places, removed support for UO:KR) |
| 12/10/2010 | >=7.0.9.0 | High Seas (sea stuff, new ships, sea markets, pirates etc) |
Magincia:
Antiga Magincia [Client <= 6.0.3.1]
Magincia em ruinas [6.0.4.0 <= Client <= 7.0.13.0]
Nova Magincia [Client >= 7.0.13.1]
Observações:
Clients a partir de 7.0.24.0 usam o novo formato de arquivos .uop e não mais .mul.
Use o client 7.0.20.0 para a expansão High Seas (ou mais atual possível).
Para a expansão Stygian Abyss recomendamos o client 7.0.8.2.
