Dungeon







The Dungeon is a vast underground labyrinth made of Bricks that is generated on world creation, being located on either the far right or left of the map, and contains unique enemies whose spawn rates increase the deeper a player travels. It begins at an above-ground entrance structure resembling a castle, and extends down to near-Underworld depths. One Dungeon is generated in each world, appearing in one of three Dungeon Brick colors, and with one or more Dungeon Brick Wall patterns. Accessing the Dungeon below 0' requires first defeating Skeletron (see Access below).

In the versions, some passages are blocked off by Cracked Dungeon Bricks. These blocks look almost identical to regular dungeon brick, but appear slightly crumbled, and drop no blocks when destroyed. Breaking one block may break adjacent false blocks in a chain similar to the behavior of Desert Fossil. False blocks may also break spontaneously when the player walks on them or uses a grappling hook. Using a Dangersense Potion will highlight these blocks. Cracked Dungeon Bricks also conceal large, rectangular rooms lined with spikes and occasionally filled with water, so caution is advised.

The Dungeon contains a dense assortment of unique furniture and Mechanisms that can be retrieved by the player for later use. Chain Lanterns are wired to Switches, which the player can toggle on and off. Several Dart Traps are wired to Pressure Plates, providing an extra hazard to players. Traps like these can also sometimes be found above-ground at the Dungeon's entrance. The bound Mechanic is found below 0', and is freed when spoken to.

There are many shelves in the Dungeon, on which are Books, Lesser Healing Potions, Lesser Mana Potions, and occasionally Water Candles and Water Bolts, which appears as a blue book with a yellow stripe in placed form. Life Crystals cannot spawn in the Dungeon.

There are several locked Gold Chests containing both loot unique to the Dungeon and standard Underground loot. A Golden Key is required to open each of these, and will be consumed upon unlocking a chest. Locked Biome Chests are also present, but they can only be opened after Plantera is defeated and the player has obtained a respective Biome Key.

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).

On the versions, after a player defeats Golem and Skeletron in a world, a group of 4 Cultists will spawn at the entrance of the Dungeon. Killing them will summon the Lunatic Cultist, and killing the Lunatic Cultist will initiate the Lunar Events, an end-game event.

Access
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, a "curse" option will be displayed, which will turn the Old Man into Skeletron when clicked. Speaking to the Old Man during the Day will not allow the player to fight Skeletron. By defeating Skeletron, the Clothier NPC becomes available, and will spawn when a suitable vacant house is available.

The Dungeon can be entered but not fully explored before Skeletron is defeated. Traveling to -3 depth in the Dungeon before it has been defeated will summon Dungeon Guardians which will generally kill most players with a single hit. The Dungeon Guardians are practically invincible, and killing them will not grant access to the Dungeon, and the only item gained from defeating a Dungeon Guardian is the Bone Key.

The player can tell if the requirements to spawn Dungeon Guardians are met if the music changes to the Dungeon track, or if they have a Depth Meter equipped that reads "Level" or "X' Underground". Dungeon entrances are located at varying heights, but are always some distance above zero depths, making their entrance structures and 1-2 screens of depth generally safe from Guardians.

Hardmode post-Plantera Dungeon
When Plantera is defeated for the first time in a world, the status message "" appears, meaning that new enemies will now appear in the Dungeon. They are generally much more difficult than ordinary Dungeon enemies, and drop new powerful items. It also becomes possible to open the Biome Chests present in the Dungeon.

The particular post-Plantera enemies that spawn in a Dungeon area are based off of the background walls, present, which also correspond to the Faction Flags found naturally placed in the area. 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. Each wall type has "usual" enemies to spawn, but there is always a small chance of other Dungeon enemies spawning, and this chance is increased if a lucky player is present. For example, Skeleton Snipers can still rarely spawn in areas with Dungeon Brick Walls, even if no Slab Walls are nearby.



Tips

 * Farming for Bones is harder in a post-Plantera dungeon, as the weaker enemies will be overridden by the spawn rates of post-Plantera enemies, which don't drop bones. However, bones will be of little use by the time the player has gotten this far.
 * If the player wants to navigate the Dungeon in a post-Golem world, ignore the Cultists when entering. Defeating all four of them by accident will spawn the Lunatic Cultist, so be cautious.
 * Spike-covered pits that are filled with water are very suitable for Dungeon Fishing.
 * While the Dungeon is technically only associated with the Bound Mechanic, the Bound Goblin Tinkerer and Unconscious Tavernkeep can also spawn in the expansive hallways and rooms.

Trivia





 * The decorative banners placed in front of the various walls hint as towards the enemies - e.g. the Diabolic Sigil is found in tiled wall areas, where the Diabolist spawns.
 * It is possible (though unlikely) for a boulder trap to spawn with a dungeon tunnel passing between the boulder and pressure plate. The dungeon bricks between the trap will be removed, leading to a functional boulder trap, and an entrance into the dungeon.