Desert



The Desert is a sandy biome. Each map will generally contain at least two Desert areas. The main Desert, present in every world, will be larger and will house the Underground Desert biome beneath. Pyramids can rarely appear in Desert biomes. Pools of water may rarely appear in the desert, which take on a sandy yellow (on ) or turquoise (on ) color.

The Oasis mini biome can be found inside the desert, which includes palm trees and a big pool of water in the middle.

On the, the main desert has a 1 in 3 chance of containing some kind of entrance to the Underground Desert below. These entrances come in four varieties: Chambers, Anthill, Larva Hole, and Pit. On the, the main desert will always have an Anthill-type entrance.

An area is considered a Desert biome if there at least 1500 Sand Blocks, causing the water and background to change, but Desert plants and enemies can spawn on even a single block of sand. Deserts are overridden by most other biomes, including the Ocean. Rain will occur in Deserts just as in any other surface biome. On the of Terraria, Sandstorms may also occur periodically, which cause special enemies to spawn as well as pushing the player according to the direction of the wind.

During Hardmode, the increased spread of the Corruption/Crimson and Hallow is likely to eventually convert any normal Deserts. Corruption/Crimson Deserts spawned upon world creation may also be turned into Hallow ones if they are inside the world part that is instantly converted at the beginning of Hardmode. All variations will be similar to their main biomes (e.g. The Corruption or The Hallow): the music theme is the same, the enemies are the same (except for Mummy variants and sandstorm enemies), and the background is just slightly different. The sand will be replaced by ebonsand, crimsand, or pearlsand. Although their color will change, cacti still drop Cactus when cut, and Waterleaf are also able to grow in a Hallowed Desert.

While in either a normal Desert or Hallowed Desert, the music track will play, but Corrupted Deserts will play  theme and Crimson Deserts will play  theme. Sandstorms will also override the music with their own.     

Happiness
NPCs that like the Desert:


 * Arms Dealer
 * Dye Trader
 * Steampunker

NPCs that dislike the Desert


 * Dryad
 * Angler
 * Merchant
 * Zoologist

Trivia

 * The Desert is the only biome not to contain any special fishing catches.
 * According to the Bestiary entry for the Sand Shark, a saltwater river ran through the desert in ancient times.