What are the requirements for the Cyborg NPC to move in Terraria?

The Cyborg is a unique NPC in Terraria who sells high-tech items, such as rockets, nanites, and the Proximity Mine Launcher. To get the Cyborg to move into your world, you must meet specific requirements. The Cyborg will only appear after you have defeated the mechanical bosses and have an available house for him. Here is a detailed explanation of the mechanics, strategies, and tips to ensure the Cyborg moves in successfully.

First, you need to defeat the three mechanical bosses: The Destroyer, Skeletron Prime, and The Twins. These bosses are advanced versions of earlier bosses and are part of the Hardmode progression. The Destroyer is a massive worm-like boss, Skeletron Prime is an upgraded version of Skeletron with additional arms, and The Twins are two flying eyes that attack with lasers and fire. Defeating these bosses is essential because the Cyborg will not spawn until all three have been defeated. You can summon these bosses using specific items: the Mechanical Worm for The Destroyer, the Mechanical Skull for Skeletron Prime, and the Mechanical Eye for The Twins. These items are crafted using Souls of Night, Iron or Lead Bars, and other materials at a Mythril or Orichalcum Anvil.

Once you have defeated all three mechanical bosses, you need to ensure you have a suitable house for the Cyborg. The house must meet the basic requirements for any NPC: it must be at least 6 blocks wide and 10 blocks tall, have walls, a door, a table, a chair, and a light source. The house must also be in a valid location, meaning it cannot be in a corrupted or hallowed biome unless you have taken steps to purify the area. If you have an empty house that meets these requirements, the Cyborg will move in automatically after the mechanical bosses are defeated.

There are a few important tips and considerations to keep in mind. First, make sure you have enough houses for all your NPCs. If you are close to the NPC limit, you may need to build additional houses to accommodate the Cyborg. Second, consider the Cyborg's happiness. While happiness is not required for him to move in, keeping him happy will reduce the prices of his items. The Cyborg prefers to live in the Snow biome and likes to be near the Steampunker and the Tavernkeep. Placing him in the Snow biome with these neighbors will maximize his happiness.

Common mistakes to avoid include not having an available house or not defeating all three mechanical bosses. Some players may defeat only one or two of the bosses and wonder why the Cyborg has not appeared. Make sure you have defeated all three before expecting him to move in. Another mistake is placing the Cyborg in a biome he dislikes, such as the Desert or Jungle, which will reduce his happiness and increase his prices.

Advanced techniques include optimizing your NPC housing layout to maximize happiness for all NPCs. For example, you can create a Snow biome town with the Cyborg, Steampunker, and Tavernkeep living close together. This setup will keep all three NPCs happy and provide discounts on their items. You can also use pylons to create a fast travel network between your towns, making it easier to access the Cyborg and other NPCs.

Resource requirements for summoning the mechanical bosses include Souls of Night, which are dropped by enemies in the Underground Corruption or Crimson, and Iron or Lead Bars, which are common crafting materials. You will also need a Mythril or Orichalcum Anvil to craft the summoning items. Preparation for the mechanical boss fights includes gathering powerful weapons, armor, and accessories. For example, the Daedalus Stormbow with Holy Arrows is highly effective against The Destroyer, while the Megashark is a strong choice for Skeletron Prime and The Twins.

Class and equipment considerations depend on your preferred playstyle. Melee players should use weapons like the Shadowflame Knife or the Fetid Baghnakhs, while ranged players can use the Megashark or the Daedalus Stormbow. Magic users may prefer the Crystal Serpent or the Golden Shower, and summoners can use the Spider Staff or the Optic Staff. Make sure to equip accessories that boost your damage, defense, and mobility, such as the Warrior Emblem, Ranger Emblem, or Wings.

In specific scenarios, you may need to adjust your strategy based on the biome or time of day. For example, fighting The Twins at night is easier because they are less aggressive during the day. Similarly, fighting The Destroyer in an open area with platforms can help you avoid its attacks. Always prepare for boss fights by setting up arenas with campfires, heart lanterns, and buff stations to increase your survivability.

In summary, getting the Cyborg to move in requires defeating all three mechanical bosses and having an available house. Pay attention to his happiness by placing him in the Snow biome with preferred neighbors. Avoid common mistakes like not having enough houses or not defeating all bosses. Use advanced techniques to optimize your NPC layout and prepare thoroughly for boss fights with the right equipment and resources. By following these steps, you can successfully bring the Cyborg into your world and take advantage of his high-tech items.