The Underworld (also known as Hell) is the deepest layer of the world, marked by dark rock with orange lines through it near the top followed by a spacious cavern. It is a large, open cavity that stretches across the world's bottom, with a ceiling of Ash Blocks and a lower terrain of large Lava pools, Ash Blocks, and Hellstone. It also contains several Ruined Houses, which are natural structures containing unique furniture and other loot. The Underworld is considered the most challenging biome prior to Hardmode.
The Underworld contains many hazards, most prominently its broad expanses of Lava. It also contains several unique and difficult enemies. Hellstone, of which much of the solid surface consists, is a valuable crafting material that can only be obtained in the Underworld; however it inflicts damage to players on contact without the proper equipment, while mining it also causes more Lava to form. Any Water that enters the Underworld evaporates.
The Wall of Flesh boss can be summoned here. Defeating it will cause the world to convert to Hardmode. It is possible to summon the Wall of Flesh accidentally, by inadvertently killing a Voodoo Demon positioned over lava. This is likely to surprise and kill most unprepared players.
The middle two quarters of the Underworld contain several Ruined Houses, which are Obsidian and the less common Hellstone Brick towers that contain Shadow Chests, Hellforges, Pots, Obsidian Furniture, and other lootable items. Shadow Chests require the Shadow Key to open (acquired in the Dungeon's locked Gold Chests, the Golden Lock Box from Dungeon Crates, or dropped from Arch Wyverns), and can contain unique Underworld-only loot.
Contents[edit | edit source]
|Characters||Unique Treasures||Unique Drops|
After defeating a
From Shadow Chests:
From Fire Imps:
From Red Devils:
From Voodoo Demons:
From Arch Demons:
Tips[edit | edit source]
- The Underworld starts at about 3000 feet deep in a large world, at about 2000 feet in a medium world, and at about 1300 feet deep in a small world.
- If you stick around the roof in the top part of the Underworld, you may find parts of an Underground Jungle.
- You can dig a tunnel two blocks wide down to the bottom of the world. With a Lucky Horseshoe, Wings, or by jumping with a Cloud in a Bottle at the end, you can fall down this tunnel, commonly called a "hellevator" (even in other games.) Since you're in a two-block-wide space, monster spawn rates are heavily reduced, especially Fire Imps. This gives you the chance to mine as much Hellstone as you want, but use caution when expanding this tunnel; a larger cave has higher chances of Fire Imp spawns.
- A very effective way to counter Fire Imps and Red Devils with your own minion. If you don't have one yet, your first priority should be to craft an Imp Staff out of Hellstone Bars. Then when you're attacked by a Fire Imp, click your Imp Staff on top of the enemy Fire Imp, and your Imp will take out the enemy imp. That will make mining Hellstone Ore much safer and faster.
- Despite the more sequential boss difficulty, the Underworld is actually far easier to survive in than the Dungeon or Underground Jungle. A player should by all means explore the underworld as soon as they have a pickaxe that can mine hellstone, or even before if they would like to make use of Hellfire Arrows or the Demon Scythe spell, so long as they have sufficient means of avoiding the lava.
- After the Wall of Flesh is defeated and the world enters hardmode, the Underworld may become, ironically, the safest place because of the spreading Corrupt, Jungle, Hallowed, and Crimson biomes. You should have already gotten your own Imp Staff (or similar) so that when you defeat a Mechanical boss you will be able to effectively deal with the new Red Devils and Lava Bats will spawn, which drastically increases the danger of the Underworld. (Note: this can happen before hardmode, if a Mechanical boss is summoned and defeated before the Wall of Flesh.)
- One way to deal with Red Devils and Lava Bats is to build temporary tunnels and bunkers as you mine Hellstone. But be careful to not use stone blocks, because later when you start smashing Demon Altars to bring forth rare ores, one of your stone blocks might get converted to Ebonstone/Crimstone or Pearlstone and although that will not spread underground Hallow or Corruption/Crimson, you will have a hard time finding it and completely purifying your world.
- You can bring 50 pieces of Meteorite to the Underworld and thus create an artificial Meteor Biome. However, this is no longer useful in any way during hardmode as meteor heads stop dropping loot once the Wall of Flesh has been defeated.
- A possible way to create a "hellavator" is to simply make a small hole and drop a few stacks of dynamite into it.
Achievements[edit | edit source]
|It's Getting Hot in Here • "Spelunk deep enough to reach the molten underworld. "|
|Reach The Underworld for the first time.|
|Rock Bottom • "The only way is up!"|
|Reach the very bottom of The Underworld.|
|Rock Bottom • "Reach the bottom of the World"|
|Reach the very bottom of The Underworld.|
|To Hell and Back • "You have gone to The Underworld and back without dying!"|
|Go to The Underworld and back without dying.|
|Hellevator • "Go from the surface to The Underworld in under a minute."|
|Go from the surface to The Underworld in less than 1 minute.|
Notes[edit | edit source]
- Just above the Underworld (if Backgrounds are on) will be the old background the Underworld used to have. It can be recognized as a warning that the player has gotten close to the Underworld.
- After defeating the Wall of Flesh and unlocking Hardmode, the game will draw in diagonal sections of Hallow and Corruption/Crimson (depending on which one your world generated with). Within these diagonals water can exist in the Underworld because the biome within the diagonals are rewritten as Hallow or Corruption/Crimson. The water will not evaporate unless segments of the pool are outside of the diagonal.
- In the 3DS version, the bottom right corner of the underworld has a Super Mario World fire flower icon.
- No background or foreground shaders can be applied by anything in the Underworld aside from normal lighting devices. This is apparent when fighting the Moon Lord, as blocks are not darkened, and the background is still visible.
- When you get close to the Underworld, the screen will start to waver slightly, in a manner similar to the shimmering caused by heat.
Gallery[edit | edit source]
History[edit | edit source]
- 1.3.3: Added heat distortion effect.
- 184.108.40.206: New background and soundtrack, replacing the Eerie music.
- 1.2.4: The Underworld (as well as the Dungeon) has more new Furniture generated at world creation.
- 1.2.3: Fixed the bug where removing walls in the Underworld would not update the map.
- 1.2: Added Obsidian Furniture to ruined houses, and allowed rooms to generate horizontally. Also added Red Devil, Lava Bat, and new backgrounds.
- 1.1: Demon Torches are added to ruined houses.
- Pre-Release: Introduced.
|Surface Layers||Forest • Desert • Ocean • Snow • Jungle • Mushroom • The Corruption • The Crimson • The Hallow • Space|
|Underground Layers||Underground • Cavern • Underground Snow • Underground Desert • Underground Jungle • Underground Mushroom • Underground Corruption • Underground Crimson • Underground Hallow • The Underworld|
|Special Biomes||Meteorite • Granite Cave • Marble Cave • Spider Nest • Bee Hive • Dungeon • Lihzahrd Temple|
|Other||Living Tree • Enchanted Sword Shrine • Floating Island • Underground Cabin • Chasm • Pyramid • Jungle Shrine • Living Mahogany Tree • Jungle Sanctum • Ruined House|