Overview
Ultima Online is credited with popularizing it’s genre and is still running to this day. It is played solely online, in a medieval fantasy setting similar to previous Ultima titles.
It is known for its timing-based player versus player combat system and its community oriented character progression. Ultima Online is played by thousands of players who pay a monthly fee on multiple game servers known as shards.
Multiple expansions have been released since Ultima Online’s launch but, its game engine and graphics make it outdated compared to recent massively multiplayer games. This however changed in 2007 with the release of Ultima Online: Kingdom Reborn which features a new game engine with updated graphics. Ultima Online’s active player base is around 135,000, which approximately 50% of whom are Japanese.
Crafting
Ultima Online features a vast crafting system that allows players to create a large majority of the items found and used in Ultima Online. These include items such as weapons and armor; to more decorative items like furniture and clothing. Most items made by a player are a higher quality then what can be found from a NPC vendor.

Skills
Skills in Ultima Online are presented by a percentage that shows the player's mastery of the skill, they increase while they are in use. There are a multitude of skills available in the game: ranging from combat skills such as Swordsmanship and Magery, to crafting skills like Blacksmithy, Tailoring and Alchemy.

All characters can earn a maximum of 700 percentage points to divide between as many skills as the player would like the character to have. Skills can be set to raise, lower or hold their points; allowing players to customize their character's skill set.
Some skills require the consumption of resources, such as raw materials; while others cost nothing but time. Many skills have also been introduced in order to balance and prevent characters from becoming too powerful. An example of this would be the Anatomy skill which increases a character's mastery with Healing and multiple melee combat skills. While Meditation and Evaluate Intelligence were added as enhancements for magic-using characters. These additional skills, along with a 700 percentage point cap, dictated that players should consider carefully how to develop their characters so that they are as efficient as possible in their chosen fields.
Alchemy
Create various potions using regents as their main ingredient.Anatomy
A melee combat skill where it increases the amount of damage you do as well as how much you heal when you bandage yourself or others.Animal Lore
This is a complimentary skill to Animal Taming. You are able to view statistics or animals or monsters you target.Animal Taming
You are able to tame and control animals using this skill.Archery
Increases your ability of using a bow or crossbow.Arms Lore
This is a complimentary skill to Blacksmithy. You are able to view statistics or armor or weapons you target.Begging
Allows you to beg NPCs for gold.Blacksmithy
Allows you to create metal armor and weapons using ingots as their main ingredient.Bowcraft/Fletch
Allows you to create bows, crossbows, arrows and bolts using lumber as their main ingredient.Bushido
This allows you to use various samurai abilities.Camping
Allows you to create a temporary living space around a camp fire.Carpentry
Allows you to create furniture for player houses and boats using lumber as their main ingredient.Cartography
Allows you to create various maps for navigation and also allows you to decrypt treasure maps.Chivalry
Allows you to use various paladin abilities.Cooking
Allows you to cook various amount of foods.Detecting Hidden
Allows you to see hidden players.Discordance
This is a complimentary skill to Musicianship. This allows you to reduce various statistics of a monster.Evaluating Intelligence
Allows you to determine the targets intelligence and increases the damage of your spells.Fencing
Increases your ability of using Fencing class weapons.Fishing
Allows you to fish with either a fishing pole or net.Focus
Increases your Mana and Stamina regeneration.Forensic Evaluation
Allows you to examine a corpse and reveal the killers name and it's looters. Also allows you to examine lockable chests to see you picked the lock and who looted the items.Healing
Increases your effectiveness of using bandages.Herding
Allows you to force an animal to move to a certain location.Hiding
Allows you to hide in certain locations.Inscription
Allows you to create spell scroll and spell books using empty scrolls and regents as main ingredients.Item Identification
Allows you to identify an item and reveal it's magical statistics.Lockpicking
Allows you to pick locks from chests or doors.Lumberjacking
Allows you to harvest wood from trees.Mace Fighting
Increases you ability to use Mace class weapons.Magery
Increases your ability to cast spells.Meditation
Increases Mana regeneration.Mining
Allows you to harvest ore and smelt them into ingots.Musicianship
Allows you to play instruments.Necromancy
Allows you to use various necromancer abilities.Ninjitsu
Allows you to use various Ninja abilities.Parrying
Increases your ability to block attacks using shields.Peacemaking
This is a complimentary skill to Musicianship. This allows you to prevent a monster from attacking you on sight.Poisoning
This allows you to poison bladed weapons, food or drinks.Provocation
This is a complimentary skill to Musicianship. This allows you to force a creature to attack a selected target.Remove Trap
Allows you to remove traps from doors and chests.Resisting Spells
Increases your ability to resist spells.Snooping
This is a complimentary skill to Stealing. Increases your ability to look into NPC's or player's Inventory.Spirit Speak
Allows you to heal off corpses.Stealing
Increases your ability to steal items out of NPC's or player's inventory.Stealth
Allows you to move while you are hidden.Swordsmanship
Increases your ability to use Sword class weapons.Tactics
Increases the damage you deal off a melee attack.Tailoring
Allows you to create clothing or leather armor using cloth or leather as main ingredients.Taste Identification
Allows you to view the statistic buffs from potions and also lets you to see if food or drinks are poisoned.Tinkering
Allows you to create various amounts of tools using ingots as the main ingredient.Tracking
Allows you to reveal creatures or players that are around your area and what direction they are located.Veterinary
Increases your ability to heal animals using bandages.Wrestling
Increases your ability in hand-to-hand combat.The Death of Lord British

Rainz was later banned after complaints from other players who'd been victims of another exploit Rainz had found, and failed to report it to Origin.
Expansions
- Ultima Online: Second Age, released October 1, 1998 - Added new land called Lost Lands, also an in-game chat system and new creatures were added.
- Ultima Online: Renaissance, released April 3, 2000 - Added the Felucca world where its a darker duplicate world which allows player killing, while Trammel the original world does not.
- Ultima Online: Third Dawn, released March 7, 2001 - Added a 3D client and a new area only accessible to 3D clients called Ilshenar until the release of Lord Blackthorn's Revenge expansion.
- Ultima Online: Lord Blackthorn's Revenge, released February 24, 2002 - Added Todd McFarlane designed characters and also improved the games AI, in-game help and character creation.
- Ultima Online: Age of Shadows, released February 28, 2003 - Added new land called Malas with new housing improvements, item insurance and two new classes called Paladin and Necromancer. The item system upgraded to a Diablo style system with many properties that can affect gameplay.
- Ultima Online: Samurai Empire, released November 2, 2004 - Added new land called Tokuno Islands with Japanese mythology and folklore. Two new classes called Ninja and Samurai.
- Ultima Online: Mondain's Legacy, released August 30, 2005 - Added new race called Elves, a new skill called spell weaving and several dungeons.
- Ultima Online: Kingdom Reborn, released June 27, 2007 - Updated graphics engine and improved interface.
- Ultima Online: Stygian Abyss, released September 8, 2009 - Adds a new land called Ter Mur, a race called Gargoyles, 3 new skills and the largest dungeon in UO's history.
Booster Packs
Announced on August 28, 2010, Mystic Entertainment will now focus on a "booster style" development process. Their current goal is to release 2 booster packs per year.- Ultima Online: Adventures on the High Seas, releasing October 12, 2010 - Adds 4 new ships with addable weapons, attackable NPC pirate/merchant ships, 2 new seafaring bosses, a floating dock town and some major improvements to the fishing skill.