Most difficult boss you've faced.

[D Moness]

The first that comes to mind is Nyx from Persona 3. Yeah I only attempted him 3 times but the bastard has like 9 "forms," can attack twice per turn, and has a really uber-powerful attack that can strike the entire party that he won't hesitate to use for both his attacks that he gets per turn.
Never did beat the bastard.

Try 13 forms >.<
I like the persona games but the weakness system can really screw you over.
Not to mention the Nyx avatar kept spamming Mudo on aegis every time she got resurrected.
Also a little buggy team AI (if i put in the option heal/assist do not run head first and attack the monster)

 

[TaboriHK]

I faced Psycho Mantis without switching the controller over to second player. Yes, it took somewhere around 30 minutes. Yes, the ammo does respawn. And yes, you do hit him with about every 50th shot.

 

[Canadamus Prime]

The first that comes to mind is Nyx from Persona 3. Yeah I only attempted him 3 times but the bastard has like 9 "forms," can attack twice per turn, and has a really uber-powerful attack that can strike the entire party that he won't hesitate to use for both his attacks that he gets per turn.
Never did beat the bastard.

Try 13 forms >.<
I like the persona games but the weakness system can really screw you over.
Not to mention the Nyx avatar kept spamming Mudo on aegis every time she got resurrected.
Also a little buggy team AI (if i put in the option heal/assist do not run head first and attack the monster)

Right sorry, 13 forms. It's been awhile since I've played that game. It wouldn't be so hard if it wasn't an instant game over as soon as the protagonist went down.

 

[ShinyCharizard]

I usually put KH1 or KH2 Sephiroth in these threads... but,

after recently beating Dark Souls I'll say Kalameet is a definite contender.

Kalameet is a difficult fight but I'd say Sephiroth is a whole order of magnitude more difficult.

 

[AD-Stu]

In recent memory? Probably the Brayko boss fight in Alpha Protocol. Cocaine-mega-strength FTW! Incidentally, it also takes the cake for best boss fight music - if it weren't for the music, I think I would've rage-quit much sooner.

There were one or two in Dragon Age: Origins too.

Probably a whole bunch I can't remember from the 16-bit console era.

 

[Jfswift]

On my first time through, Yunalesca took me FOREVER to beat. I remember my cousin was watching me play, got tired of me dying, decided to go see a movie, go to the store, had dinner, then came back, and I was STILL trying to beat her. GAH. On subsequent playthroughs I always grinded for at least an hour before fighting her. No problems since then though. Oh I also had the American version so there weren't any dark aeons to fight.

I also had trouble with Seymour's third form, but Yunalesca took the cake.

I hate Yunalesca. I was just thinking about her too. Took me a while to figure out that in zombie state you were immune to her cheap instant death attacks.

 

[Kapri]

Hm the ones that come to mind are the golem boss in Metroid Prime 3. It sucked on normal but Hard mode? I just gave up and by gave up I mean rage quit. The other one is Zodiark from Final Fantasy XII. Took me sooooo many tries to beat that cheap ass bastard and what sucked was I'd get him down to one or two hits but he just kept firing up that stupid ass paling and I couldn't deliver the killing blow ARRRRGHHHHHHHHHH!!!

 

[DrunkenMonkey]

"Dark Vincent" in Catherine on normal mode. I had 99 lives and was down to the last 12-15 before finally beating him. Oh god, that was just too much teeth grinding.

 

[emeraldrafael]

Its somewhere between Nyx (persona 3 fes), elizabeth (persona 3 fes), Margaret (persona 4).

Porbably elizabeth. you cant even use your best attacks against her.

 

[Rush Syks]

Looking at my profile should pretty much tell you, which game had my worst boss.

Goes by the name "The Lost".

Has to be killed in five rounds, fully heals after three if he's not below 30% HP.

Can one-shot any team.

Everyone I know of, who was able to beat him without cheating actually had to dedicate a complete playthrough to this goal, due to the screwed-up leveling system of TLR.

I've yet to find the courage to face him in hard mode.

 

[Jesse Billingsley]

Armored Core V: Big Red, The Giant Spider, and Mechanical Bird. impossible to beat solo

 

[NerfedFalcon]

I always have the same answer to these kinds of threads: Youmu. F***ing. Konpaku. Yes, the expletive was absolutely necessary.

Want to know how much of a pain in the ass she is? You literally cannot win without bullet time. And there's no button for it - her most BS attacks generate it. The boss gives you bullet time in order to make the fight winnable. That, and most of them involve jumping all over the arena, making her difficult to deal any sustained damage to.

 

[Deadlock Radium]

First up is Dark Bahamut from Final Fantasy X. That fight was ridiculous. You spend most of the battle trying desperately to keep your party members alive and free of status effects and there is very rarely any good opportunity to attack. Still I managed to beat him after a hell of a long fight. Definitely the hardest Dark Aeon I found.

I haven't really played FFX, but I had FFX-2 for some reason that I do not know myself, and I remember the Bahamut fight there. Not an easy fucker at all. Took him though, after some attempts.

My addition to the horrible boss-pile is Hades from God of War 3 on the hardest setting. Goddamn, that boss is hard. I gave up taking him on after a while.

Also, try Belial with a glass cannon Demon Hunter on Hell on Inferno, 1 vs 1. As soon as I get a friend with me, he's a pushover at a level like Maghda (Which by far is the biggest pushover in the game imho), but alone, that one is a tough cookie.

 

[Windcaler]

Tough one. I really want to say something from Dark souls but I would be lying. I think the hardest boss Ive fought in recent memory was when I tried soloing the Tyrant zombie in Raiderz a few months ago. You have to have perfect dodges nearly the whole fight or he can very easily kill you. It took me around 10 tries before I finally did it and even fighting Gwyn while completely naked and with default fists doesnt require the timing that fight does

 

[WhiteFangofWhoa]

Weigraf/Velius

Trust me, you're not the only one. The one after him is potentially even worse if your characters are slow.

As for the hardest one I've ever faced, there's only one I remember that has consistently killed me no matter how many times I play through the game- Boost Guardian in Metroid Prime 2. Even when you know all the tricks he can surprise you and take off about 90 energy for your trouble when your highest possible E-Tank count is 4 and it's already counting down from Dark Aether's atmosphere. The worst combination is for him to go into Boost Ball mode, smack into you (he moves incredibly fast in this state) and THEN transform into a blood puddle while you're next to him for 150+ damage on Hard Mode! I've beaten every Metroid game multiple times except for Hunters, and if I play Prime 2 10 more times Boosty will remain by far my greatest challenge.

...Except for the distinguished few I've never beaten despite multiple tries, such as Zophar in Lunar 2. You know a boss is truly hard when there's exactly one video on Youtube of someone beating him, and it's five videos long.

 

[Arakasi]

Cthulu was pretty hard in Magika, but at least beatable.

The one boss that pissed be off the most was in that Hulk game for Gamecube. It was some other guy who had turned into a hulk equivalent whose lifebar regenerated 3 times, and it was hard enough just getting it down one life bar. Ugh, I never beat that boss.

 

[Matt9102]

Oh god, New Destroyman so much! No More Heroes 2 is a pretty hard game to begin with, and New Destroyman and the Final Boss (who is the worst boss and the worst character in the series) are just impossible. New Destroyman is only higher than the Final Boss because you play as Shinobu, who is the worst character ever. After she finishes a combo, she pauses for a second to taunt the enemy. The only way to avoid that is never do a combo, which to me is the only way to beat the fight. Not to mention, there are 2 bosses at the same time. So yeah, besides a few stupid Monster Hunter hunts, that is the hardest fight.

 

[kyuzo3567]

The first boss in that one uber-hard Devil May Cry game (3?). Never beat him. Didn't really try. Wasn't interested.

That would probably be the original DMC. I found that one much harder that DMC3.
Was it a giant lava/fire spider thing?

 

[Kekkonen1]

I wouldn't call this the hardest boss battle by any stretch, but its the only one that has made me break my controller in pure anger.

It was Xenosaga Episode 1 (or Episode 2, its been so long I honestly cant remember).

The last save-point before the last boss is a good 30+ minutes away with lots of battles. Well there the boss has two forms, you get no save or healing in between the forms and the second form quite randomly and cheaply gets to spam several overpowered attacks in a row without the chance for player input. Unless you are very high level it is a battle of chance, will he do his two most powerful attacks in a row or not?

After dying for the fourth time in a row I raised my arm, made a calculation that my anger and frustration was worth the money a new controller would cost me, and threw it across the room into the opposite wall and went out and bought a new controller. First and last time I've actually broken something valuable in anger.

 

[Smolderin]

Most of the hardest bosses I have ever fought come straight from the Kingdom Hearts series. The hardest boss I ever fought and beaten? Young Xehanort on Critical in Kingdom Hearts 3D. Seriously, not only does he hit like a truck and have a ton of health, but once you get him down to 0 HP, he says, "Time Stop"! and a big clock is summoned, you have to kill the clock within a certain time period before you have to face him all over again, albeit with less health but damn it is still cumbersome. It's made hard by the fact that he constantly summons fast moving and hard hitting clones who's sole purpose is to keep you away from the clock.

Hardest boss I have ever faced and have never beaten? Mysterious Figure from Birth By Sleep. Oh I can beat Vanitas's Lingering Spirit but screw Mysterious Figure, that guy has a set of combos that can kill you in one go, extremely erratic and unpredictable movements, and he takes forever to beat.