- For tips on navigating the Dungeon, see Guide:Surviving in the Dungeon.
The Dungeon is a vast underground brick labyrinth that is generated on world creation, either on the far right or left of the map. It begins at an above-ground entrance structure resembling a castle, and extends down to the deeper Cavern depths. A single Dungeon is generated in each world. Accessing the Dungeon requires first defeating Skeletron (see Access below).
After Plantera is defeated, the Dungeon spawns new, more powerful enemies, which offer access to new items. Not all enemies spawn in all Dungeons: The particular background wall type generated for a particular Dungeon, as well as the corresponding Faction Flags scattered around, determine which post-Plantera enemies spawn there. See below for info.
The Dungeon contains unique furniture and enemies, whose spawn rates increase the deeper a player travels. There are also several Chests containing both Dungeon-only loot (listed below) and standard underground loot. A Golden Key is required to open each of these, which can be obtained from Pots, Dungeon Slimes, and from other Chests in the Dungeon.
The Dungeon uniquely contains a dense assortment of placed furniture and other items that can be retrieved by the player (using a Pickaxe) for later use. These items include Books, Water Candles, Chain Lanterns, Switches, Dart Traps, and Spikes. The bound Mechanic and the bound Goblin Tinkerer (if the Goblin Army is defeated) can also be found here, and can be freed when spoken to.
Several Dart Traps are Wired to Pressure Plates throughout the Dungeon, providing an extra hazard to players. One of these is often found above-ground at the Dungeon's entrance. Chain Lanterns are also found wired to Switches, and some are switched off. You can right-click on these switches for a quick light source, instead of having to place your own. All of these items can be freed and picked up for later use by the player.
In order to gain unrestricted access to the Dungeon, Skeletron must first be defeated. Skeletron is summoned by speaking to the Old Man, who guards the Dungeon entrance, at Night. The "curse" option will display, which will turn the Old Man into Skeletron when clicked. Speaking to the Old Man during the Day will not allow you to fight Skeletron.
The Dungeon can be entered but not fully explored before Skeletron is defeated. Traveling below zero depth in the Dungeon before Skeletron has been defeated will trigger multiple Dungeon Guardians, who will kill you with a single hit. If you can find a way to kill the Dungeon Guardians, they drop a rare and special item! You can tell if the requirements to spawn the Dungeon Guardian are ready if you hear the dungeon music, if you hear the Dungeon Guardian roar, or use a depth meter. Killing the Dungeon Guardian will also grant you deeper access into the dungeon, but it is assumed that you can and must still kill Skeletron.
|Enemies||Unique treasures||Unique drops|
 Hardmode post-Plantera Dungeon
When you enter a Dungeon after defeating Plantera during Hardmode in the PC version, new more difficult enemies spawn. They will be much stronger than the regular enemies, and there is even one enemy that deals more damage than Skeletron Prime. There will also be 5 Dungeon Chests, which require Dungeon Keys to open. It's recommended that the Hardmode dungeon only be tackled once a player has Hallowed armor or better.
The particular post-Plantera enemies that spawn in a particular Dungeon area depend on its background wall type. A single Dungeon can contain multiple background wall types in different sections, or just one type. Whether a Dungeon contains different types can only be determined by exploring the Dungeon. A player will often need to generate more than one world, and defeat Plantera in each, in order to encounter all post-Plantera enemy types.
|Wall Type||Unique Enemies||Unique Drops|
| Blue Brick Wall
Green Brick Wall
Pink Brick Wall
|Blue Armored Bones||no unique items|
|Skeleton Commando||Rocket Launcher|
|Paladin|| Paladin's Hammer|
| Blue Slab Wall
Green Slab Wall
Pink Slab Wall
|Rusty Armored Bones||no unique items|
|Ragged Caster||Spectre Staff|
|Skeleton Sniper|| Rifle Scope|
| Blue Tiled Wall
Green Tiled Wall
Pink Tiled Wall
|Hell Armored Bones||no unique items|
|Tactical Skeleton|| SWAT Helmet|
Enemies above additionally drop the following in all Dungeon types:
Bone Lee appears in all Dungeon types, and drops the following:
- The Dungeon will always be on the side of the map opposite the Jungle. If you're looking for the dungeon and run into a Jungle, turn around and go the other way.
- A player is considered to be in the Dungeon if they're below the depth of -4 feet and standing in front of any naturally-placed Wall, if there are at least 250 Dungeon Bricks on screen, except dirt walls.
- You may also farm wires from the dungeon by using a wire cutter.
- Most Dungeons, regardless of their visible background walls, have tiled walls behind their foreground blocks. After Plantera has been defeated, mining the blocks can expose the tiled walls, potentially allowing enemies associated with those walls to spawn.
- 188.8.131.52: Now only generates hardmode enemies after Plantera is defeated.
- 1.2: Now generates with biome-key locked chests and Faction Flags that denote what will spawn there in Hardmode.
- Now has its own music instead of the Eerie theme.
- 1.1: Now generated with traps and light sources wired to switches.
- Pre-Release: Introduced.
|Forests • Deserts • Ocean • Jungle • Snow • The Corruption • The Crimson • The Hallow • Rain • Mushroom Biome|
Underground • Cavern • The Underworld • Underground Jungle • Underground Snow • Underground Corruption • Underground Crimson • Underground Hallow
Dungeon • Meteorite • Floating Island • Giant Tree • Spider Nest • Pyramid • Bee Hive • Lihzahrd Temple