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The change of background that marks the end of the Underground layer and the beginning of the Cavern layer below it.

The Underground is the first layer below the surface. It fills the area between the Surface and Cavern layers, beginning at a depth of 0ft and extending downward.

The Underground can be recognized by its distinctive background, which no longer contains naturally-placed Dirt Walls like surface terrain, but instead displays a unique backdrop with no naturally-placed walls. Players cannot remove this backdrop using a Hammer, nor can they place blocks in midair, as no wall generally exists here (though players can place their own walls, just as they can above surface terrain). Natural Underground blocks are generally similar to those in the surface.

The Underground is home to more aggressive enemies than the surface, as well as traps, Chests, and Underground Cabins.

True underground versions of biomes, such as Ice biome or Underground Corruption, do not actually begin in this layer, but in the Cavern layer (with the exception of the Underground Desert, which begins in Surface terrain and extends through the Underground and a portion of the Cavern). In Hardmode, some blocks in the Underground can be converted into Hallow, Corruption, or Crimson.

Contents[edit | edit source]

Music[edit | edit source]

These music tracks play while the player is in the Underground. Like most other tracks, they can be recorded with Music Boxes. Desktop Version When Otherworldly music is enabled, the track from Terraria: Otherworld will play.

Internal # Title Condition Album Version Listen Description
12 Underground Cavern and Underground Vol. 1 1.0 It's a fast and whimsical track, with an almost robotic tone.
31 Alternate Underground Cavern and Underground Vol. 3 1.2.2 It has a different, less whimsical feel than the original Underground theme.
65 Underground (Otherworldly) Cavern and Underground n/a A heroic-sounding track which features violin. Its internal name is "Music-Main Theme (Underground)" which suggests it was meant as a title screen track, which in turn fits with its grand intro.

History[edit | edit source]