Expansions

Following Expansions or DLCs were released for The Elder Scrolls Online:

Murkmire
DLC Game Pack
 * Blackrose Prison arena

Wolfhunter
DLC Game Pack
 * Moon Hunter Keep
 * Enter the Hunter's Glade
 * New items, Monster Masks from Vykosa etc

Summerset
Chapter
 * New zone and story
 * Island of Artaeum, new skill line of combat abilities
 * New, craftable gear
 * Cloudrest - a 12-player trial

Dragon Bones
DLC Game Pack
 * New area Fang Lair and Scalecaller Peak
 * New Monster Masks, Achievements, item sets
 * Renegade Dragon Priest Mask
 * New dungeons

Clockwork City
DLC Game Pack
 * Enter Sotha Sil's Clockwork City and investigate a new daedric threat
 * A new area with unique architecture, creatures and hybrids
 * 12-Player challenge - Asylum Sanctorium
 * Asylum Weapons
 * New armor sets, items, crafting motifs and etc.

Horns of the Reach
DLC Game Pack
 * Free for ESO Plus members
 * 2 new dungeons: Bloodroot Forge and Falkreath Hold
 * New unique item sets, Monster Masks
 * New Achievements, Boss collectibles and titles
 * Gain all Horns of the Reach Achievements and earn exclusive costumes and new dye

Morrowind
Chapter
 * Return to Morrowind and explore Vvardenfell
 * New class - the Warden, who can whield nature-based magic and comes with a powerful War bear ally.
 * New PvP mode, Battlegrounds, small-scale, 3-Team, 4v4v4 battles in arena environments
 * New epic Elder Scrolls Story, set 700 years prior to the story in TES III. Help Vivec to save the world.
 * New 12-player trial

Homestead
Free Update
 * Homes with unique architectural style
 * Thousands of items to customize the home
 * New crafting system adds the ability to build furniture
 * Invite guests!

One Tamriel
Free Update
 * Adventure without limits Tamriel
 * Challenge friends and strangers to duels
 * Ammunition
 * New solo adventures in Craglorn
 * Holiday celebrations with new quests and equipment

Shadows of the Hist
DLC Game Pack
 * Free for ESO Plus members
 * 2 Argonian themed dungeons, Normal and Veteran versions
 * 2 new monster masks, 6 new unique item sets
 * New Achievements, collectibles and titles
 * Unique heroic personality reward

Dark Brotherhood
DLC Game Pack
 * Free for ESO Plus members
 * Players can join the guild and become a killer for hire
 * New Gold Coast region
 * New repeatable quests
 * New assassin skill sets

Thieves Guild
DLC Game Pack
 * Free for ESO Plus members
 * Players can join the thieves guild
 * New Thieves Guild skill line
 * New story content
 * Daily heist missions
 * 12-player Trial challenges
 * New items and armor sets

Orsinium
DLC Game Pack
 * Free for ESO Plus members
 * 20 hours of story content
 * New zone for all levels
 * The Maelstrom Arena - single player challenge
 * Old Orsinium and Rkindaleft - public dungeons
 * New gear and new crafting styles

Imperial City
DLC Game Pack
 * Free for ESO Plus members
 * Open at level 10
 * PvE/PvP
 * 6 Imperial City Districts
 * Two new group dungeons, for normal an veterans
 * Tel Var Stones currency to purchase legendary armor
 * Xivkyn racial motif style and new item sets
 * Imperial City collectibles