Never managed to beat the first form of the final boss in Final Fantasy: Crystal Chronicles. Gave it a few tried then gave up, and eventually traded the game in. I saw screens of the last form or whatever and it looked awesome, and I'm pissed that I never got to actually see it.

Final boss of DMC4, I tried it once and it went on for so long that I was like "how good could the ending really be?". I'll probably get on and beat him one of these days, but I'm not too worried about it. ^_^

GH II: Freebird on expert. I can never get past the extended passage of up and down runs.

zirnitra:
to me the whole mission counts as a boss epilogue on veteran COD4

It took me two hours to get a perfect one minute run of that level. It is pretty damn tough.

The final boss in Prince of Persia: Rival Swords. HE is the sole reason I hate quick-time events.

ElArabDeMagnifico:
I think my Half-Life game was buggy so no matter what I did to the last boss, nothing happened. Fought him for hours, went to gameFAQs, BUT HE WOULDN'T DIE.

YES,
I was fighting him for ages and he wouldn't f**kin die, there must be a glitch.
What happens after you beat him... Anyone?

Solidus Snake from MGS 2, I didnt try all that much, but when he starts dashing all over the place it pissed me off to no end.

RAAM on Insane in Gears of War.
I try for a little while, then lose interest >.>

EDIT: I am quite proud to have beaten the epilogue to CoD4 on Vet, though. Even though it pissed me off, I kept trying. And it payed off ;O

The queen of (something) in Paper Mario and the Thousand-Year door. I could jut NOT beat her.

i dont remember her name but the last dark jedi from kotor2

OK i beat him RAAM but he is one of THE toughest bosses i have ever gone up against, and i NEVER beat lou on expert in GH-III that firey red ass is cheating one....same thing too he used the lefty flip...bastard

I uh
...
I never actually finished a full game of Master Of Orion 2.

Magruder, the final boss in GUN. Perfectly possible to defeat in Easy and Normal, but completely impossible in Hard. Super powerful near automatic shotgun that kills in two hits. and the only way to harm him is (ignoring the whole bullet through the unprotected skull idea that has worked on everyone else in the game) to use dynamite bows to detonate vents in the floor that shoot out green gas. You need to hit him with these blasts about fifteen times, and unlike in the previous difficulties he now has a tendency to run away so he wont get hurt, and will fire his (super accurate) shotgun back at you.

The Core in Cave Story. At least I THINK it's the last one. Gotta love Boss rushes.
*beats Misery*
"cool, I get to fight The Doctor now"
*Beats Doctor*
*Beats Doctor's second form*
"Save point plz?"
*Core + Misery 2.0 + Red Crystal Sue*

Granted, I've only made 2 attempts so far. I only started playing 2 days ago, after all. But yeah, it counts as the final boss I haven't beaten. Yet, obviously.

Also, King Dedede in Kirby's Dreamland. Hard mode, of course. Hell, I revisited the game recently and was killed by Hard Mode Whispy Woods. I'm amazed I even managed to get UP TO Dedede in hard as a 12 year old.

Not really a boss, but the last level of Everything or Nothing.

Mile high club on veteran in cod4, and i stopped playing zelda phantom hourglass before the last boss, didn't interest me.

The ending boss of Ratchet and Clank 1. I just cant go through the whole level!

golden sun 2. DAMN those dragons are hard with that massive meteor strike :(. Il do it eventually >.>

i also cant beat the chrystal chronicals last boss. I DO have a guide that says to get the best gear. But trawling through the same place over and over again just isnt fun. I havnt traded it in but i just cant be bothered.

Lubu in Dynasty Warriors 6 on the hardest difficulty. I can get him close but then he hits me once because I sneeze and I explode.

CriMs0nC0bra:
RAAM on Insane in Gears of War.
I try for a little while, then lose interest

forget about it ifyou're not playing coop.

The game I hate with passion is Batman Returns for the "portable" console Atary Lynx. in fact I never arrived to the final boss in the second level (Catwoman).

buggy65:

HSIAMetalKing:

the monopoly guy:
*sighs*...GLaDOS...I'm going to go cry now.

Leave me to my shame!

You deserve that shame, sir! Go beat that game right now!

You must get that ending song! You must! For the love of God!!! Beat that Game!!!

What if you hate that song?

And I never beat the final stage of Parappa the Rapper. It's what pretty much made me hate rhythm games until Patapon. Which I did beat, tyvm.

The last boss in Kingdom Hearts, not that I couldnt I jsut got feed up of having to watch the cut seen over and over everytime i died with out a skip button!!!

Aerach:
Final boss of DMC4, I tried it once and it went on for so long that I was like "how good could the ending really be?". I'll probably get on and beat him one of these days, but I'm not too worried about it. ^_^

I thouht his "final" boss form was a lot easier than when you fight him earlier when he hops in the huge statue before you have a chance to get to him and fists you in the ass.

However, kick it old school. Mike Tyson from Mike Tyson's punch out. I could get to him, but I could never beat him. Haven't tried it in forever though.

The final Boss of Baldurs Gate 2, Throne of Bhaal. On her own, my team could have kicked her arse to next sunday... but add the fact she summons up about 8 of the hardest bastards in the game the moment you begin, and it beomes a hand-wringing challenge.

Then add the fact that you have to do it about four times without resting, and intermittently killing a bunch of elemental princes... no... no I don't think so.

I got through the first couple of rounds by abusing the "Greater Wish" spell to revive my dead party members (i.e. most of them) and re-learn all of my spells, but no. No matter how many times I hit quick-save and quick-load, the outcome was invariably the same.

Screw you bitch, I didn't want the throne that much anyway. You can have it.

HSIAMetalKing:
I-No from Guilty Gear. I mean, Jesus fucking Christ, that bitch was a cheater! One of the reasons I hate facing computer opponents in fighting games is because they are able to execute combos, counters and guards that no human could possibly string together.

Haven't beaten her yet by 'normal means'. The way to block her retarded 'WARNING' attack, is to use faultless defense.

I HAVE beaten her, twice. With Millia Rage, and with Chipp, my main. Even then, it's a huge pain to get the instant kill off with Chipp (who is such a bad match-up against Axl, who's always the last in line, right before I-No)

Tekken Dark Resurrection also has such a lame boss. Beaten him multiple times, because the game is just like that, really. Get in a hit, and odds that you'll win are big. Get hit first, you're boned.

Also, the final boss in Castlevania Dawn of Sorrow. His first phase is piss easy, the second, not so.

Needless to say, Guitar Hero bosses are also a pain.

somedude98:
golden sun 2. DAMN those dragons are hard with that massive meteor strike :(. Il do it eventually >.>

If you have played GS1 as well, and brought over the characters, you'll have a pretty easy time (though it can still take up to 20-30 minutes). Just put all djinni on your backline to set (and make sure you have the Iris summon), and set all djinni except 2 (out of 3) to 'active' (or w/e it's called... just make sure you can use it).

Have 2 people in your frontline just constantly use and set their damage lowering djinni, whilst the other 2 keep attacking (Meggido on Isaac, wewt) and occasionally healing whenever needed. After a while, the dragon will use the djinni resetting spell, and soon your frontline party should die. Then, immediatly use Iris (and the 3rd damage mitigation djinn so whoever summons it won't die again), and deal as much damage as possible on the dragon as you can (before they die). When that happens, you'll switch back to your revived 'main party', and within a few more attacks, he'll die. If you don't have GS1... ouch. Apparantly you can still get one djinn from GS1 by doing some extra temple in GS2, I'd get Flash there (party will take 1/10 damage when he's used in the turn)

Ruby and Emerald Weapon on Final Fantasy 7 still thoroughly leave my arse in ruins.

even after 11 years...

Colonel Crowe at the end of Farcry: Instincts, he is just freaking impossible and Mr Stone on the original Rayman.
And it's not a boss but I've completley given up on TLoZ: A Link to the past, I swear I don't know why it's so hard, I definately prefer the 3D Zeldas.

To whomever said Lunar: It's not bad game design... the bosses just scale to your level. It's so that they are always a challenge. Stick with it. At least that's how the PSone games were.

I can't remember a boss recently I gave up on. The Witcher has some hard ass bosses and I beat Cave Story, but gave up on the bonus dungeon, if that counts.

gains:
Raam from Gears. I don't know why. I even went to the FAQs and everything. I was playing it right, but I just couldn't hit him enough times before he drove me into the flocks of bats. Overall, I was unhappy with fighting him anyway. After working through all of the game where the type of weapon you use was secondary to how you used it, being forced to use explosive arrows and the sniper rifle instead of your trusty assault rifle felt like a cop out.

You just need a partner to help you - if you wanna complete it and you have live send me a message on live.

Mostly bosses from rental titles, but though I never played Lunar 1, if he's anything like Zophar in Lunar 2 anyone who complains about either of them is justified.

1st phase is pretty simple, but it's obvious he's got to have more than that. 2nd phase always kills me; Not only must you sit through tons of dialogue while an invincible Zophar pounds on you and you can do nothing but heal, after the real fight starts it's not much different. He has 1 head and 4 hands, each with their own powerful attacks and more HP than the 1st form apiece. Some FAQs I read suggested a suicide run at the head but that never seemed to work since the hands prevent physical strikes on it besides Poe Sword and some of Leo's stuff. He also gets 2 different insta-kill attacks, one of which is only used after 10 rounds or so (the laughter). Either way, there's not much you can do if he insta-kills Ronfar enough times so you run out of revive items (to be fair, I was only Level 56 and didn't have the items to grind any higher so maybe being Level 60+ helps). I only ever managed to kill 2 of the hands at best before either running out of revives or simply getting overwhelmed by all the damage. Great music though.

Apparently he actually has a 3rd phase you fight with just Hiro and Lucia as well, which is equally difficult.

The sorceress boss at the end of Final Fantasy VIII, the characters used in battle are chosen at random at she will always be the same level as you (If you level up she will too)

Lunar 1 and 2,... really?

I don't remember even dying at all on those bosses. It's a shame, the endings are BRILLIANT!

EGG in SaGa Frontier 2, often considered the hardest Traditional RPG End Boss ever... because he's nearly impossible to beat. He has 7 or so Suplimentary Bosses,each of which you can defeat before hand to make him easier... the catch is, each of these fights knocks out one of your characters, sometimes the powerful ones you REALLY need to fight the EGG proper and even after you beat all 7 of these, he's STILL REALLY POWERFUL!

The final boss from Donkey Kong 64, on paper it sounds very easy - get all the stupid monkeys to jump into cannons and fire themselves at the boss, however the only thing that ended up being fired was the game cartridge at the wall after being ripped out of the console. There are several 'mysterious' holes in my bedroom walls. And we never completed it. =[

sirdiealot88:
The final boss from Donkey Kong 64, on paper it sounds very easy - get all the stupid monkeys to jump into cannons and fire themselves at the boss, however the only thing that ended up being fired was the game cartridge at the wall after being ripped out of the console. There are several 'mysterious' holes in my bedroom walls. And we never completed it. =[

OMG I never beat that game because I couldn't beat the original Donkey Kong you had to play to get the coins.

:( I suck at those kind of games.

Okay, for the guys having trouble with Half-Life, you need to stop him from regenerating (it's not hard, so I won't say how) then get above him and blow his brains out (preferably with a non-guided shot from the rocket-launcher - the laser throws off your aim and anyway it's more stylish).

Now, final bosses I couldn't beat...

That guy from Wolfchild (embarrassing, I saw someone PUNCH him to death on Youtube);

The last level of Aquanox (I could take out both bosses, as much as was possible, but those EFFing giant fish that attack the convoys that kept winning out - oh, my kingdom for a quicksave!).

Can't think of any others.