Boss order by stage
Pre-Hardmode boss order (1.4.5)
Terraria 1.4.5 has 8 pre-Hardmode bosses, and a world gets 7 of them because the Eater of Worlds only lives in Corruption worlds and the Brain of Cthulhu in Crimson worlds. The usual order is King Slime → Eye of Cthulhu → Eater of Worlds → Brain of Cthulhu → Queen Bee → Skeletron → Deerclops → Wall of Flesh. King Slime and Deerclops are optional; the Wall of Flesh ends pre-Hardmode.
The order
1. King SlimeHe has the lowest damage of the early bosses and drops the Slime Hook and Ninja armor, so he is the gentlest first fight.2,000HP · Classic
2. Eye of CthulhuIt is the first real check of your gear and its drop is the ore you need for the next tier of weapons.2,800HP · Classic
3. Eater of WorldsIt is the Corruption world's gate boss: its Shadow Scales craft the Nightmare Pickaxe that mines Hellstone.10,050HP · Classic
4. Brain of CthulhuIt is the Crimson world's gate boss: its Tissue Samples craft the Deathbringer Pickaxe that mines Hellstone.1,250HP · Classic
6. Queen BeeFight her before Skeletron: The Bee's Knees, Bee Gun and Hornet Staff carry ranged, mage and summoner builds through the Dungeon.3,400HP · Classic
7. SkeletronBeating him opens the Dungeon, its loot (Muramasa, Water Bolt, Cobalt Shield) and the Clothier.4,400HP · Classic
8. DeerclopsOptional, but its weapons (Lucy the Axe, Pew-matic Horn, Houndius Shootius) are strong for this point of the game.7,000HP · Classic
9. Wall of FleshIt is the last pre-Hardmode boss: killing it turns your world into Hardmode.8,000HP · Classic
Stats table
| Boss | Classic HP | Expert HP | Master HP | Defense | Summon item | |
|---|---|---|---|---|---|---|
| 1 | King Slime Pre-HardmodeOptional | 2,000 | 2,800 | 3,570 | 10 |  Slime Crown |
| 2 | Eye of Cthulhu Pre-Hardmode | 2,800 | 3,640 | 4,641 | 12 |  Suspicious Looking Eye |
| 3 | Eater of Worlds Pre-HardmodeCorruption | 10,050 | 15,120 | 19,296 | 4 |  Worm Food |
| 4 | Brain of Cthulhu Pre-HardmodeCrimson | 1,250 | 2,125 | 2,709 | 14 |  Bloody Spine |
| 6 | Queen Bee Pre-Hardmode | 3,400 | 4,760 | 6,069 | 8 |  Abeemination |
| 7 | Skeletron Pre-Hardmode | 4,400 | 8,800 | 11,220 | 10 | see page |
| 8 | Deerclops Pre-HardmodeOptional | 7,000 | 11,900 | 15,172 | 10 |  Deer Thing |
| 9 | Wall of Flesh Pre-Hardmode | 8,000 | 11,200 | 14,280 | 12 |  Guide Voodoo Doll |
See every boss, including the 14 event bosses, in the boss order checker.
Questions players ask
What is the first boss in Terraria?
King Slime or the Eye of Cthulhu. King Slime is optional and the gentlest; the Eye is the first real gear check.
Do I have to kill the Eater of Worlds or the Brain of Cthulhu?
Yes in practice: their scales or samples craft the pickaxe that mines Hellstone, which you need before the Wall of Flesh.
Is Deerclops required?
No. Deerclops is an optional loot boss.