Top 10 Hardest Terraria Bosses

The Top Ten
1 Duke Fishron

Here's my tips for Duke Fishron:
1. MOBILITY. IS. KEY. Focus on avoiding him and his attacks first, then attacking second, because he can do a crap ton of damage up close.
2. Fight Golem first. I fought Duke Fishron after Golem, and got curbstomped three times before I beat him. Mind you, this was in NORMAL. Before I beat him, I beat Plantera and Golem both first try (albeit Plantera was with heavy preparation), yet Duke Fishron was probably the boss I spent the most time on.

Yes I know he's hard I go on normal mode he's (of course) easy. I have the meowmere and it was (again) easy but I still had a friend with me. My friend and I defeated the pillars and then come the moon lord. Even on easy mode with the best sword in the game, full heath, and a friend with the expert type of the best yo-yo and we didn't get the moon lord to half heath when we both died. When we fought fishron my friend died first but I got the final blow and we defeated him in a matter of minutes.

Travel through walls and cannot camp it out without dying if not using a slime statue farm. You need wings and titanium armor instead of chlorophyte or hallowed in case you failed to dodge one of his dashes. Together with the hardship of catching his summoning item, he is easily the hardest boss in the game even beating the moon lord who you can farm easier.

I've fought him three times now and I had the Solar Eruption AND full Solar Armor on me. I also had the Cosmic Car Key but even with that he is just too fast to get around. Every attack is simple to get around but the dashes are simply unfair. The Moon Lord is a breeze compared to this guy.

2 Moon Lord

Normal mode? Okay.
Expert and Master Mode?
You better cheese him because in 1.4 he is the most overpowered garbage dump that this world has ever seen. People call Duke Fishron harder than this guy? I can beat Duke easily, but not ML solo. He is super hard, and deserves to be at number one at this list.

The Moon Lord is annoying in a way that it makes you lose almost every single time. It's almost impossible to beat without the Solar Eruption, and you actually require an arena or just a roof to avoid them damn lasers. Overall, the most prestigious boss in Terraria. Duke Fishron has seen better days...

Endgame boss, high damage, the eyes are very hard to dodge. Without a nebula or vortex armor, you may find it very hard to kill with a nebula blaze or vortex beater. A solar eruption is useful if you want to beat it easier. When fighting him, make sure to keep the percentage of his eyes similar, and destroy them at about the same time so you can beat the heart straight afterward.

Moon lord definitely is the hardest boss. I had to cheese him multiple times before I got a good enough weapon to fight him with. As for duke fishtron, it is extremely easy as long as you have the right arena. (Asphalt on the floor, campfires and heart lanterns). As for enraged duke fishtron, I killed him 26/27 times without a proper arena. It was only after, when I smashed him in expert mode, did I realise that he was enraged.

3 The Twins

One time I was going to get Asphalt to make an arena to wreck this guy, but in the middle of my underground expedition, guess what happened.

This is going to be a terrible night...
The blood moon is rising...

Somehow I survived

Hardest mech boss by far. Some people think that skeletron prime, or even the destroyer is the hardest, but the other two are relatively easy with a good strategy. With the twins, you need quick reflexes, precise aim, high mobility, strong weapons and armor, lots of buff potions, a carefully thought out arena, powerful accessories, the best modifiers, a bit of luck and a lot of practice. Doesn't help that you HAVE to actually fight this boss to progress through the game. Still a fun and very creative boss and he remains a fun boss to fight post-plantera due to his difficulty level.

Damn, these guys are hard. The strategy is, you gotta take out Spazmatism first then get Retinazer for an easier fight. Spazmatism is way too hard at Phase 2, but learn his algorithm of attack, and he's not so hard as you think. Retinazer seriously is uhhh, not too good. It won't take much effort to beat, as long as you avoid the lasers.

I killed #10 on this list, and I also killed the Brain of Cthulhu, Skeletron, the King Slime, and the Eater of Worlds. Well, I want to kill #7 on this list to unlock hardmode to summon The Twins! Give me a Mechanical Eye if you have one.

4 Plantera

Remember to clear the terrain and be prepared when fighting it for the first time, or you can hardly do any maneuvers in the jungle. It is a large boss with high damage. You can hardly kill it with melee weapons besides spears at that stage of the game. Your bullets are easily wasted since its hitbox is not as large as its reach. You don't even have a raven staff as a summoner and there is no corresponding class set up by the new ores you mine.
Try magic weapons for best.

Plantera is DAMN HARD. The uhh spike balls that she shoots are annoying, the petals are of a hindrance, and Phase 2's little mini-thingamajigs are hard. Overall a hard boss.

Plantera is reasonably easy, I took her out with the scourge of the corrupter and the Terra blade in a mine shaft. That only happened because I have the chlorophyte mask and hallowed armor. The best way in my opinion is the two teleporters and shooting at her through slits. best weapon recommendation is possessed hatchet

Use teleporter on 2 sides of an arena and make a wall of any block to block mobs from spawning in on the side of the wall. You can then shoot it with a bow or gun whichever. Add campfires and heart lanterns. I could barely beat it this way!

5 Skeletron Prime

Skeletron Prime has a lot of limbs. Some of them are useful, some of them aren't. He's still strong, but being on platforms basically immobilizes one of his limbs. Just kill the limbs, then kill the bone man.

Well, this took a long time to defeat! I spent 2 days devising a plan to beat him and it still wouldn't work. I killed the twins for a practice round, because they are pretty easy. I killed him AFTER my friend and I beat the frost moon. I felt weak compared to terraria, but I know that a lot of others feel that way also.

You cannot farm it since its limbs are hard to deal with. When you find the pattern of attack, it is reasonable. Very hard to fight without the north pole or other later weapons.

Are you kidding me Skeletron was the easiest boss! It took me about 1 minute to defeat him!

6 Eye of Cthulhu

Eye of Cthulhu was pretty easy, if I beat it I get some red and black ore (I already wasted it on a sword and bow ) that I found in caves. I got somewhere about 24 or less ores. But it was a little annoying since he goes up into the air and I am horrible with the diamond staff so I just waited to use my rainbow claws and I killed him. Took me a total of 2 minutes.

This boss should be easy when you join hard mode. If you are a beginner or started a new character it would be best to fight king slime before you fight the eye of cthulhu. It is recommended to have a musket with a couple hundred bullets and at least 10 defense points.

The eye of Cthulhu is extremely easy. I beat him first try with wood armor and a tungsten sword. I would say this boss is easy, and if anyone isn't able to beat it, they are not good at game.

I have full beetle armor, the phantasm, the stardust dragon, and the solar eruption. However, I am still not able to defeat him yet!

7 Wall of Flesh

Pretty hard, but not too hard. If you come in with hardmode gear he's the easiest thing ever, and even pre-hardmode is still pretty easy. However, if you're not prepared you are going to struggle with this boss. I recommend getting a minishark and molten armor.

He was so easy I had a physician skull water walking boot combo and had ended up with a glitch world where I went above 0 level in the dungeon before killing skeleton and found a rainbow gun in a normal chest took me 10 seconds.

Well, I beat him with 11 golden hearts and a titanium sword, not as hard as I thought.

He keeps shooting lasers at me until I die, sometimes this is annoying.

8 King Slime

Not so hard I mean it's a giant slime just it has a ninja and crown, oh and it also does s butt load of damage. that's why I hate all the bosses they make me use a greater healing potion then they attack me and then I can't use the potions and then I DIE!

People are RETARDED! "I beat him in 20 seconds, and all I had was end game weapons and armor, fighting a pre-hard node boss! ". This should be for what you WOULD have at a certain stage of the game that the boss is found!

Bruh this is easily the hardest boss in the game. I think it is literally impossible to beat and definitely needs to be rebalanced. If it is even beatable does anyone have any tips on beating this monstrosity.

The hardest boss ever. It makes the game unfair and impossible on how good it is. Make this boss easier in version 1.4 please. 1 vote= one vote for easier King Slime!

9 Ocram

It used to be in the Mobile version of terraria so I know. It has a lot of forms of attack and is hard to dodge. It easily kills a player in hallowed armor if he is not dodging properly. The summoning item was expensive to make.

With complete turtle armour the Terra blade wings and a twenty by twenty box around you he's easy I've beaten him 13 times and I've spawned him 13 times so...

Ocram is just a palette cleanser, kinda like Sally Stageplay from Cuphead.

Not that tough. I beat him with a Nights Edge and Adamantite Armor.

10 Golem

Whilst Golem is easy, King Slime is miles easier.
For starters, King Slime is the very first boss you fight, whilst Golem is one of the last bosses you fight.

Then there's the fact that King Slime can be cheesed by building 30 Ropes up into the sky and throwing shurikens down at him.

I have dragon armour and the terra blade and I still can't take him out when everyone says he's easy. I got up to level 10 with the pumpkin moon but I can't beat him?

Easiest to farm although it might be a bit damaging and tough. Its attacks are very simple to observe and dodge.

Easy boss, just put him in a box with traps and stay on top of him until his head is messed up, I remember a long time ago when I was bored I would always do this to the golem >w< my brother still has some of his gear but I lost my account due to some change in devices and removal on accident

The Contenders
11 Green Slime

This boss. THIS. BOSS. I've tried fighting him with the Last Prism, Meowmere, S.D.M.G., Solar Eruption, Lunar Flare, and even Zenith, all with Godly modifiers and heavy buffs. But the first time I even ATTEMPTED to fight him, I was only able to do 2 damage to him before he jumped at me, killed me, went to my base, killed all of my NPCs, blew it up, covered the entire world with Corruption, then deleted the world AND my character, and slept with my mom. I'm able to beat Duke Fishron, the Solar Pillar, Moon Lord, and Supreme Calimitas ALL AT THE SAME TIME within only 10 seconds, but this boss is way too much for me. Red please nerf thank you

I've used full nebula armor, all the magic buffs, and the last prism, yet I only managed to deal 5 damage to this thing. The 14 max health is far too much for a post-ML boss, and that doesn't even count the 28 health it gains in expert mode. Even with a skybridge stretching across an entire large world, complete with campfires, heart lanterns, stars in a bottle, and bubble blocks for the cute fishron buff, it is near impossible to dodge its jump attack, which deals a staggering 6 damage. Because I've been spending the past month straight on my computer, trying to beat this creature, my family has called authorities repeatedly, who have filed me a missing person, thinking I committed suicide. Terraria has severely damaged my mental health solely because of this impossible boss. After finishing this post, I'm going to uninstall the game, leave a negative review on steam, and sue Re-Logic for creating this horrible game.

This isn't even a boss! It's just pure hell! I have endgame gear and yet these little idiots keep sneaking up on me and kill me in an instant! Honestly these idiots don't drop enough money! These bois also have like a few million health points! I feel like the people saying the slime is too easy are just being sarcastic. I really can't beat them like at all! They should be removed from terraria because of how difficult they are to kill!

I honestly don't know how to fight this boss. I fought it with full vortex armour, a coin gun shooting millions of plat coins, and a S.D.M.G, but before I died, it came in my mansion, killed all my NPCs, raided all my chests, and knocked the whole thing over. If anyone knows how to hack and kill it, please come in my world and reduce it's 100,000,000,000,000,000,000 health to zero. It's to OP, please nerf.

12 Lunatic Cultist

Really deserves to be under Duke and Moonlord in terms of difficulty, but this guy definitely at least deserves the number 3 spot. If you don't have a proper DPS weapon for the cultist himself as well as a decent weapon that can simultaneously attack the segments of the dragon he conjures, you'll find yourself gobbled up pretty quick.

The second latest boss by progression, however, is not as hard since you can build barriers and beat it easily. You can also parry his magic attacks easily. Mind the dragon.

What? Why is he so low on the list? Golem plantera and twins were super easy and I did them all on my 1st try except this one... Am I doing something wrong?

Dude, I have 53 DEFENSE and he's still the hardest other than Fishron, Prime and Twins.

13 Brain of Cthulhu

Is a complete joke with multi-hit weapons like the starfury. Without them? He's a total pain. Just keep getting better armor and more hearts and you'll eventually beat him.

How is this easier than a green slime?

How do you defeat thi?

The brain of Cthulhu was so easy that I could beat him with wood gear

14 Eater of Worlds

Hard without right gear, which is grenades, jester arrows, or water bolt. Be wary of it splitting up.

I literally just swung my sword and took it out first time. Loss 1 heart

Easy to kill in my world

15 Queen Bee

I have 9 bee hives in my game and I didn't take one hit with my megashark she was so easy I tried with a cutlass still beat her this is too easy.

Hard as hell when you have no strategy.

I defeated 10 in 1 day!

Just not easy, even with post skeletron gear, the bees are very annoying without a a swingable weapon

16 The Destroyer

I play on Xbox 360 so I'm not sure if this works on other platforms but he's my story anyway. I just couldn't beat him, I had the best armor available at the time and I just couldn't beat him. I found out the hard way that the cobalt sheield helps a lot. Just stand still and swing your sword. The destroyers body will come to you dealing contact damage every time your invincibility wears off from being hit but the drones he spawns will die from the sword giving you hearts. So easy now. Can kill 27 in one night now.

It took me a long time to beat, but the Destroyer gets DESTROYED by the Daedalus Stormbow or other weapons that do multiple areas of damage. Just learn the attack algorithms and it'll be easy.

Well, very tough, very damaging and annoying, but its attacking pattern is so simple that you can just build a platform and cut it off with your night's edge, which is a pre-hardmode weapon.

Destroyer is pretty hard when new to hardmode, but who in their right mind would ever put eye of cuthulu and wall of flesh before lunatic cultist?

17 Dungeon Guardian

Dungeon Guardian isn't even a mini boss, much less a boss. He is actually just a really powerful enemy.

Well I just play terraria for 2 days and when I see a dungeon I go deep inside it and well you know what happen..I died the dungeon guardian is like the strongest enemy I ever met he did 1000 dmg to me

Even with turtle armour the dungeon guardian's health bar wasn't even a tenth of the way down! he's impossible!

The dungeon guardians are hardest because of they hit you it causes 1,000 damage.

18 Skeletron

It was hard for me, I was in expert mode and had full Molten Armor and a Nights Edge.

In normal mode he's a joke. In Expert? It's a nightmare.

He is easy I kick his butt with a nights edge and wood armor. he is a good thing to get the dryad

Hardest in expert mode

19 The Lunar Pillars

How do you think the nebula pillar is easy!?!?!?! I haven't even beaten it and its going underground!

Very hard. All. Even if you beat em all, the Moon Lord becomes summoned.

Their mobs are definitely pretty challenging.

20 Supreme Calamitas

It is very hard and has a ton of health, I mean, come on, it has to be #1 hardest boss in this game, but it is only in Calamity mod.

Bullet hell with awkward controls and a hit cap. Need I say more?

This is calamity mod, not normal terraria.

Very hard boss

21 Slime

Me and my friend played through the whole game and it was easy. We killed Duke Fishron and Moonlord first try. At the end we had solar armor, Terra blades, and even the last prism. We also had a pretty legit castle base with a lava pit and all the npcs. I thought we beat the game. That was until this boss came out of a bush and flew into our castle and killed me in one hit within a single frame. I couldn't even react in time. My friend managed to get 1 damage out of its 700,000,000,000 health before dying the next second. It left our castle destroyed and everything was on fire. It also killed all of our npcs before flying away. If you see this boss run for your life, IT IS IMPOSSIBLE!

What the beep this is just so eazy its not even a boss, all you need is a weapon that does 1 damage. Whoever can't beat this is a noob no even worse a failure.

I honestly don't know how to defeat him, anyone have any tips?

Slime is 174872401274291471207402170x harder than duke fishron.

22 The Devourer of Gods
23 Ice Queen

Real tough boss. Although only a mini-boss, the ice queen is really had to beat and doesn't guarantee a good drop, making its single defeat a low yielding work. It is even more annoying after 12 waves of the frost moon, as you may see a couple of these at the same time.

24 Lepus (Mobile Version)

Easier than green slime

Just get spider staff and like the fiery greatsword, ez pz. Literally took out 3 times in a row.

25 Harpy Feather
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