Last updated: 3 July 2026
Interactive Terraria Boss Checklist Track Every Kill from Pre-Hardmode to Moon Lord
Whether you're juggling multiple worlds or just lost track after a long break, this interactive checklist keeps a running tally of every boss in Terraria 1.4.5. Check off each kill, watch your progress bar climb, and see exactly which boss to hunt next — all saved automatically in your browser. For a written walkthrough of the recommended sequence, see our complete Boss Order guide.
01Terraria Boss Tracker
Pre-Hardmode
Hardmode
02Recommended Kill Order and What Each Boss Unlocks
The tracker above follows the progression sequence that gives you the smoothest gear curve. Here's why the order matters beyond just difficulty:
- Eye of Cthulhu → Eater of Worlds / Brain of Cthulhu: The ore from these two fights crafts Shadow or Crimson armor — your first real defensive upgrade. Skipping straight to Skeletron in starting gear is possible but painful.
- Queen Bee (optional): Her defeat moves the Witch Doctor NPC into your town. He sells Leaf Wings and the Tiki Armor set, making early Hardmode much more forgiving — worth the detour.
- Skeletron: Unlocks the Dungeon, which holds pre-Hardmode tier weapons (Muramasa, Handgun, Cobalt Shield) that are hard to replace until Hardmode ores appear.
- Wall of Flesh: The point of no return. Once he falls, the world is permanently in Hardmode — new biomes spread, enemies strengthen, and the entire second half of the game begins. Don't attempt this until you have solid armor and a long Underworld bridge built.
- All three Mechanical Bosses: None of them individually unlocks Plantera — all three must fall. The third kill triggers 'The jungle grows restless...' and starts Plantera's Bulbs spawning.
- Plantera → Golem: Plantera drops the Temple Key, which opens the Jungle Temple where Golem lives. Golem's death then spawns the Cultists at the Dungeon, starting the endgame sequence.
- Lunatic Cultist → Pillars → Moon Lord: This final chain is fixed and cannot be reordered. Clear all four Celestial Pillars to trigger Moon Lord's automatic summon 60 seconds later.
03Common Walls Players Hit — and How to Break Through
Certain points in the boss sequence stop most players cold, usually from under-preparation rather than bad skill:
- Wall of Flesh wall: Players who rush it in Necro or Jungle armor frequently fail because the Wall accelerates and they run out of bridge. Solution: build a bridge of at least 900 blocks across the Underworld, drink Swiftness and Ironskin potions, and clear the Hungry tentacles before focusing the eyes. Molten Armor is the best pre-Hardmode melee option.
- Mechanical Boss wall: Rushing a mechanical boss in pre-Hardmode armor with pre-Hardmode weapons is the most common Hardmode stumble. The correct sequence is: smash Demon Altars with the Pwnhammer (3 altars unlocks all ore tiers) → mine and craft Cobalt/Palladium up to Adamantite/Titanium armor → build a proper arena with campfires, heart lanterns, and a sunflower. The Destroyer first is easiest because its long segmented body is shredded by piercing weapons.
- Plantera wall: Players who find a Bulb immediately after killing the third Mechanical Boss are usually under-geared. Plantera is a significant difficulty spike. Recommended gear: Hallowed Armor, Megashark or Death Sickle, a large open arena in the Underground Jungle (at least 60 × 60 tiles) with actuated blocks or platforms.
- Moon Lord wall: Many players reach Moon Lord with Spectre or Turtle Armor and get erased. His True Eye of Cthulhu beams hit for enormous damage. Farm Duke Fishron (drops the Tsunami, Tempest Staff, and Fishron Wings) before the Celestial Pillars — it makes a meaningful difference even for players who find him optional earlier.
FAQ
What boss comes after the Wall of Flesh in Terraria?
After you defeat the Wall of Flesh, the world enters Hardmode. There is no single required next boss — instead you work toward the three Mechanical Bosses (The Destroyer, The Twins, Skeletron Prime) in any order. Most players tackle The Destroyer first because its segmented body is most forgiving against ranged and piercing builds. All three must be defeated before Plantera becomes accessible.
Which Terraria bosses are optional?
Optional pre-Hardmode bosses: King Slime, Deerclops, and (mostly) Eye of Cthulhu — though Eye drops important ore and is strongly recommended. Queen Bee is technically optional but unlocks the Witch Doctor NPC. Optional Hardmode bosses: Queen Slime, Duke Fishron, and Empress of Light. All three offer strong loot but do not gate any required progression. The chain that is strictly required to reach Moon Lord is Wall of Flesh → all three Mechanical Bosses → Plantera → Golem → Lunatic Cultist → Celestial Pillars; the earlier pre-Hardmode bosses are progression staples rather than hard requirements.
Does defeating the Wall of Flesh start Hardmode permanently?
Yes — permanently and irreversibly. The moment the Wall of Flesh dies, the world switches to Hardmode forever. The Hallow biome appears, Corruption or Crimson spreads in a diagonal V from the world center, enemy difficulty increases across the board, and Hardmode ores spawn underground. There is no toggle or undo. If you want to experience pre-Hardmode again, you need a fresh world.
How many bosses are there in Terraria total?
Terraria 1.4.5 has 18 bosses tracked in the main progression: 7 pre-Hardmode (King Slime, Eye of Cthulhu, Eater of Worlds or Brain of Cthulhu, Queen Bee, Deerclops, Skeletron, Wall of Flesh) and 11 Hardmode (Queen Slime, The Twins, The Destroyer, Skeletron Prime, Plantera, Golem, Duke Fishron, Empress of Light, Lunatic Cultist, Moon Lord — plus the Celestial Pillars which count as a boss event). Event bosses like Mourning Wood, Pumpking, and Ice Queen are separate from the main progression checklist.
Do I need to beat Empress of Light to fight Moon Lord?
No — Empress of Light is entirely optional. Moon Lord's unlock chain is: defeat all three Mechanical Bosses → defeat Plantera → defeat Golem → defeat Lunatic Cultist → destroy all four Celestial Pillars → Moon Lord spawns. Empress of Light is not part of that chain. She is a challenging optional boss available after Plantera that drops the Terraprisma and Kaleidoscope.
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