How do I make the Mechanic NPC move in Terraria?

To make the Mechanic NPC move into your world in Terraria, you need to meet specific conditions and follow a series of steps. The Mechanic is a valuable NPC who sells wiring tools, such as Wrenches, Wire Cutters, and Pressure Plates, which are essential for creating traps, mechanisms, and automated systems. HereÔÇÖs a detailed guide on how to get her to move in, along with tips and strategies to make the process easier.

First, the Mechanic can only appear after you have defeated the Skeletron boss in the Dungeon. Skeletron is a pre-Hardmode boss that guards the entrance to the Dungeon. To summon Skeletron, you need to speak to the Old Man NPC at the Dungeon entrance at night and select the "Curse" option. Defeating Skeletron is crucial because it unlocks access to the Dungeon, where the Mechanic is found.

Once Skeletron is defeated, you can explore the Dungeon. The Mechanic is usually found in the Dungeon, tied up and waiting to be rescued. She appears as a bound NPC, similar to other rescueable NPCs like the Goblin Tinkerer or the Wizard. To rescue her, you need to interact with her by pressing the interact key (default is right-click on PC). This will free her, and she will immediately move into an available house in your world.

Before attempting to rescue the Mechanic, itÔÇÖs important to prepare. The Dungeon is a dangerous place, especially in pre-Hardmode, as it is filled with powerful enemies like Dungeon Slimes, Cursed Skulls, and Spike Traps. To survive, you should have good armor, such as Molten Armor or Shadow Armor, and strong weapons like the Minishark, Starfury, or a good bow with JesterÔÇÖs Arrows. Accessories like the Cloud in a Bottle, Hermes Boots, and a Band of Regeneration will help with mobility and survivability. Additionally, bring healing potions, such as Lesser Healing Potions or better, to recover health during combat.

When exploring the Dungeon, be cautious of traps. Spike Traps, Dart Traps, and Explosives are common and can deal significant damage. Carry a Pressure Plate or a Mechanical Lens to detect traps before triggering them. A Grappling Hook is also useful for navigating the DungeonÔÇÖs vertical and horizontal passages safely.

Once youÔÇÖve rescued the Mechanic, she will move into an available house. Ensure you have a suitable house prepared for her. A house must meet specific requirements: it must be at least 6 blocks wide and 10 blocks tall, have walls, a light source, a table, a chair, and a door. The house must also be in a valid biome, such as the Forest, and not be corrupted or Crimson. If no house is available, the Mechanic will not move in, so always have extra housing ready.

To optimize the MechanicÔÇÖs happiness, place her in the Snow Biome and pair her with the Goblin Tinkerer or the Tavernkeep. NPC happiness affects the prices of their items, so keeping her happy will reduce the cost of her wiring tools. Avoid placing her in the Desert or Jungle, as these biomes decrease her happiness.

Common mistakes include not preparing adequately for the Dungeon, leading to frequent deaths, or not having a suitable house ready for the Mechanic. Another mistake is ignoring NPC happiness, which can result in higher prices for her items. Always plan ahead and ensure you have the necessary resources and housing before attempting to rescue her.

In summary, to make the Mechanic NPC move in, defeat Skeletron, explore the Dungeon, rescue her, and provide a suitable house. Prepare with good gear, be cautious of traps, and optimize her happiness for better prices. Following these steps will ensure the Mechanic becomes a valuable addition to your Terraria world.