- See also: Boss
机械 Boss是三个困难模式的Boss that can be summoned by "mechanical" items, and are themselves metallic and robotic in appearance. In addition, there is a 10% chance that one will randomly spawn each night after the first Demon/Crimson 祭坛 is destroyed in a world, and each will continue to spawn randomly until it is defeated at least once.
The Mechanical Bosses' summoning items can be crafted at a Hardmode Anvil. Each can also drop from any Hardmode enemy (except statue-spawned 敵怪 and 流星頭s), with a 1/2500 chance, until their respective boss is defeated.
Once any single Mechanical Boss has been defeated for the first time:
- 蒸汽朋克人將會到達(如果一個vacant 房屋 is available).
- 日食s can occur.
- 紅魔鬼s and 熔岩蝙蝠s spawn in the 地獄.
- 葉列茨球 can be dropped by any enemy in the 叢林 and 地下腐化之地/地下神聖之地 biomes.
- 生命果 will begin to grow in the 地下叢林 (Life Fruit will already grow in the 主機 and 移動 versions, but will now grow more after one mechanical boss is defeated).
- 撒旦軍隊 upgrades to Tier 2 and will progress to wave 7. (Betsy will not spawn however)
Defeating all three triggers the status message "The jungle grows restless...", and 世紀之花球莖s begin spawning in the 地下叢林, which are required to summon 世紀之花.
|| Spawn Message
|| Summoning Item
|| Soul Type
|| "You feel vibrations from deep below..." or "You feel a quaking from deep underground..."
|| "This is going to be a terrible night..."
|| "You feel the air getting colder around you..." or "The air is getting colder around you..."
|| 萬矢齊發 • "打敗三個夜間出沒的危險機械怪物：雙子魔眼、毀滅者和機械骷髏王。"
| Defeat all three Mechanical Bosses.
|| 機甲混戰 • "同時與雙子魔眼、毀滅者和機械骷髏王戰鬥並獲勝。"
| Defeat all three Mechanical Bosses simultaneously in a single battle.
- In the 電腦版, bringing their summoning items to a pre-Hardmode world makes it possible to defeat the Mechanical Bosses prior to defeating the 血肉牆. However, the Wall must still be defeated in order to unlock 世紀之花.
- There is a tooltip mistake for the Mechanical Worm. The tooltip says "Summons Destroyer", but should actually say "Summons The Destroyer"
- Players who aren't confident in their ability to defeat the bosses, but who want access to the Hardmode 礦石, can refrain from destroying any 祭壇s until they are ready and instead 魚 for 寶匣, which offer those ores and their bars as random rewards during Hardmode. Crates acquired pre-Hardmode can also be saved until Hardmode, and will still offer Hardmode rewards.
- Once one of the spawning messages appears at random, fleeing underground, or logging out and back in again, can prevent the Mechanical Bosses from spawning.
- In the 移動版, the player can find a 斧鑽 in a 暗影箱 in the 地獄, allowing the player to get to the 海龜盔甲 before defeating any of the Mechanical Bosses, making it much easier to defeat them on the first try.
- On the 移動版, some spoilers included The Destroyer having blue lit segments instead of red segments.
- See the individual mechanical boss articles for more specific changes.
- 18.104.22.168：生命果 now only spawns after defeating a Mechanical Boss.
- 1.2.4：Fixed bug where "The jungle grows restless" message would appear before you have beaten all 3 Mech Bosses.
- 22.214.171.124：Mech bosses no longer spawn randomly if another boss is alive. You can still summon multiple bosses manually.
- 1.2.3：Mech bosses are now slightly more difficult.
- 126.96.36.199：Mechanical Bosses will no longer spawn during 南瓜月s.
- 1.2.1：Reduced the chance for a mechanical boss summon to drop during hardmode.
- Hardmode Crimson, Corruption, and Hallow spread is now slowed after killing Plantera instead of any Mechanical Boss.
- Slightly increased the chance for an Eclipse to happen, but they will now only happen after killing a Mechanical Boss.