Advanced mechanics

Unlock the full potential of Terraria with our advanced mechanics guide. Learn about complex NPC interactions, hardmode progression, and expert strategies to conquer the game.

This guide focuses on advanced mechanics within Terraria, covering complex NPC interactions, hardmode progression, and specific item requirements for NPC spawns. It aims to provide a comprehensive checklist for completionists.

NPCs

NPCs are automated characters that provide services to the player. They move into the player's world after certain conditions are met and a suitable room is built. There are 22 Town NPCs to collect, with 7 becoming available only in hardmode. Three NPCs spawn randomly but cannot move into player-built housing. An achievement exists for having all obtainable NPCs living in the player's world, excluding Santa Claus and the three random NPCs.

Pre-Hardmode NPCs:

• Guide — The player starts with this NPC.
• Merchant — Requires the player to have 50 Silver Coins in their inventory.
• Nurse — Requires the player to have more than 100 health and the Merchant must be present.
• Painter — Requires 8 other NPCs to be present.
• Dye Trader — Requires acquiring a Dye item or Strange Plant and defeating a pre-hardmode boss. The Yellow Marigold in the Forest Biome is the easiest Dye Item to find.
• Demolitionist — Requires a player to have an explosive item in their inventory. Bombs and grenades are easily found in pots.
• Dryad — Requires defeating any Boss other than King Slime or the Wall of Flesh.
• Arms Dealer — Requires a player to have bullets or a gun in their inventory. Easiest to obtain by smashing a Shadow Orb/Crimson Heart with a hammer and getting the Musket drop.
• Party Girl — Has a 2% chance of spawning each day after 14 town NPCs have been acquired.
• Stylist — Found bound in an Underground Spider Nest; speak to her to release her.
• Angler — Found and spoken to in an Ocean Biome.
• Goblin Tinkerer — Found bound in the Cavern Layer after defeating a Goblin Invasion.
• Witch Doctor — Requires defeating the Queen Bee.
• Clothier — Requires defeating Skeletron.
• Mechanic — Found and spoken to in the Dungeon after defeating Skeletron.

Hardmode NPCs:

• Pirate — Requires defeating a Pirate Invasion.
• Truffle — Requires building an above-ground Mushroom Biome with a house in it during hardmode. The biome needs at least 100 blocks of mushroom grass. This can be achieved by placing 100 blocks of mud and planting mushroom grass seeds, which will spread. The biome is not harmed by the Hallow but can be corrupted by Corruption or Crimson.
• Wizard — Found in the Cavern layer; speak to him.
• Steampunker — Spawns after one of the Mechanical Bosses is defeated.
• Cyborg — Requires defeating Plantera.
• Santa Claus — Appears in December (15th-31st) after defeating the Frost Legion.
• Tax Collector — Found in the Underworld as a Tortured Soul mob; throw Purification Powder on him to revive him.

Achievements Pt 1: Pre-Hardmode, Combat and Exploration

There are a total of 88 achievements on Steam.

Pre-Hardmode Achievements:

• You Can Do It! — Survive your character's full first night.