Deep Dungeon
- See also: Dungeons, Trials, Raids, Field Operations, Variant Dungeons, Criterion Dungeons
Deep Dungeons are a roguelike game mode in Final Fantasy XIV.
They are multi-floor, ever-changing dungeons. Floor layouts are procedurally generated and will change each run. All players will begin at a reduced level, and only by fighting the enemies within will they be able to gain the strength and experience needed to reach the final floor.
Players can enter solo or with a party of up to four players, with no role restrictions (excluding limited jobs). Parties can be done using matchmaking (available from the dungeon entrance and not the Duty Finder interface) or with a premade party. Higher floors do not allow for matchmade parties due to their difficulty. There are exclusive achievements from successfully completing a solo run without dying.
The lack of role restrictions means healers may not always be present, making consumables such as potions and 
Phoenix Down especially useful. See also: Rehabilitation
Each dungeon contains dungeon-specific consumable items usually referred to as pomanders that can augment the party's strength or change floor effects.
List of deep dungeons
Palace of the Dead is the first deep dungeon released in patch 3.35. Entered in Quarrymill in South Shroud, Palace of the Dead features 200 floors. Players begin at level 1, and may attain up to level 60. Upon clearing floor 50, players may begin at floor 51 and level 60. Completing floor 50 is also one prerequisite to unlocking the other deep dungeons. Floors 101-200 do not allow matchmade parties.
Heaven-on-High is the second deep dungeon, released in patch 4.35. Entered in Onokoro in the Ruby Sea, it has 100 floors. Players begin at level 60, and may attain up to level 70. Upon clearing floor 30, players may begin at floor 21 and level 70. Floors 31-100 do not allow matchmade parties.
Eureka Orthos is the third deep dungeon, released in patch 6.35. Entered in the Eight Sentinels in Mor Dhona, it has 100 floors. Players begin at level 81, and may attain up to level 90. Upon clearing floor 30, players may begin at floor 21 and level 90. Floors 31-100 do not allow matchmade parties.