There are numerous Group Dungeons in ESO: one in each faction zone, one in Coldharbour, two in the Imperial City, two added to Shadowfen with Shadows of the Hist, two added to Craglorn with Horns of the Reach, another two added to Bangkorai and Stormhaven with Dragon Bones, and finally two added to Greenshade and Reaper's March with Wolfhunter.
Group Dungeons are designed to be explored with a group of four players maximum. The enemies inside will be of a much greater difficulty than those in Public Dungeons, and unless you are in a group, you'll be facing them by yourself, because these dungeons are instanced—meaning you won't see anyone not grouped with you when you enter.
Group Dungeons can be added to your map by talking to members of the Undaunted in the taverns of the major cities of each zone, and can then be teleported to directly from the Wayshrine fast-travel system. All Group Dungeons can be discovered this way. If you have not previously discovered a particular dungeon, the wayshrine for that dungeon will be added to your map upon acceptance of the corresponding pledge.
Eight of the dungeons have a "Version I" and "Version II" storyline, which can be selected upon entering the dungeon. These take place on similar maps to each other, but with different enemies and mechanics. The quests in "Version II" dungeons continue the storyline established previously in "Version I".
All Group Dungeons have Veteran Dungeon variants. These become available once you hit Level 50 and unlock Veteran content. These use the same maps and boss enemies, but the enemies have more health, deal more damage, and require more coordination to complete. They are understandably much more difficult, but earn you higher-quality loot and Veteran Dungeon Achievements.
Veteran Hard Mode
For an even greater challenge, Veteran Dungeons have an optional Death Challenge—more commonly called "Hard Mode"—that can be activated on the last boss. Hard Mode changes certain aspects or mechanics of the boss battle, such as restricting parts of the arena or adding new attacks. Hard Mode is typically activated by a member of the group reading a glowing "Scroll of Glorious Battle" that can be found on the floor near the dungeon's last boss arena. Once the scroll has been invoked, the screen flashes with a blueish-white color and everyone in party will clutch their heads and scream for a moment.
Completing a dungeon in Hard Mode grants two Undaunted Keys instead of one (if an Undaunted Pledge is active). In addition, certain items are guaranteed to drop, such as rare style materials or crafting motif chapters associated with that dungeon.
- Prior to the One Tamriel update, Veteran versions of the non-DLC dungeons continued the storyline established previously in the Normal level Group Dungeons. With One Tamriel, these former Veteran storylines became the "Version II" of a dungeon, and had a Normal difficulty added. Concurrently, the former Normal storylines became the "Version I" of a dungeon, and had a Veteran difficulty added.
- Prior to One Tamriel, dungeons had a minimum level of enemies within the dungeon and therefore the recommended minimum level of entry. Note however that it was still possible to enter before this level. When entering a dungeon, all enemies, minibosses and bosses were scaled to match the level of the group leader, or if the leader was below the minimum level of that dungeon, all enemies were set at the minimum level for that particular dungeon. With One Tamriel, all enemies and players in dungeons are scaled up by Battle Leveling.