Underground Terraria biome · Underground
The Underground is the first layer below the surface, made mostly of dirt and stone with a brown backdrop. It holds small ore veins, low-tier gems, traps and the odd cabin. It is a stepping stone on the way to the richer Cavern layer.
- Layer
- Underground
- Hardmode only
- No
- Enemies listed
- 10
- Bosses
- Eater of Worlds, Brain of Cthulhu, Queen Bee, Plantera
Where to find it
Dig down past the 0 ft line on a Depth Meter. It ends where the darker Cavern background begins.
In Hardmode
Diggers, Toxic Sludge, Green Jellyfish and Possessed Armor replace the early threats. Some blocks may also turn into Hallow or evil biome blocks.
Enemies
Notable loot
Town NPCs who like it
Tips
- Carry plenty of torches and a Mining Helmet if you have one.
- Watch for pressure plates, which trigger dart traps and explosives.
- Pick up every Life Crystal you find to raise your maximum health.
FAQ
Where do you find the Underground in Terraria?
Dig down past the 0 ft line on a Depth Meter. It ends where the darker Cavern background begins.
What enemies are in the Underground?
Giant Worm, Blue Slime, Red Slime, Yellow Slime, Pinky, Blue Jellyfish, Digger (Hardmode), Toxic Sludge (Hardmode).
What changes in the Underground in Hardmode?
Diggers, Toxic Sludge, Green Jellyfish and Possessed Armor replace the early threats. Some blocks may also turn into Hallow or evil biome blocks.
Which NPCs like living in the Underground?
Demolitionist, Goblin Tinkerer, Clothier.
Sources & picture credits
Guide text is original retrogameindex writing, checked against the Terraria Wiki. Boss statistics and drop rates are the game values shown in the Terraria Wiki’s infoboxes. Sprites and artwork © Re-Logic; local copies archived from Terraria Wiki file pages (listed on the image gallery).