Who is a Boss that gave you a really hard time? (Any game)

Xehanort posessing Terra's body - final battle in Terra's path from Kingdom Hearts: Birth by Sleep.
Somehow it got easier fighting him in "true" ending.

I still haven't beaten Boss Battles in Super Smash Bros Brawl on insane difficulty, I have only rarely gotton to the last boss Tabuu and I always lose to his damn 1 hit KO move

Seimour from FFX...He's like a mother in-law.

well the final boss on quake 2 held the prize for a boss i h8 most in a game for quite a while,and then i played god of war on hardest difficulty ... pretty much any boss in god of war that requiers me to spin the fkin thumbstick at past lightning speed is impossible for me

I doubt anyone plays this, but the Old One in Dungeon Defenders annoyingly hard, not just because the boss battle is difficult, but if you fail, you have to do the 4 levels leading up to him (about 1.5 hours worth) again.

Chains of Olympus final boss... That 5 min. unskippable cutscene was quite an ordeal

Poison Ivy on hard difficulty in Arkham Asylum. The rest of the game was pretty simple on that difficulty but that fight will always irk me.

Shao Kahn in UMK3, took me about 15 tries the first time I beat him

The last boss in Haunting Starring Polterguy. The game froze every time I got to it so I could never beat it. Boss so strong he hax the game. :(

Game: Dragon Age: Origins;
Boss: High Dragon
Difficulty mode: Nightmare

How many tries it took: .....9001?

Resident Evil 4- Salazar, Dead Space 3- Snowbeast

I always play on Hardest Difficulty :) It makes game more, MORE fun.

C'thun.

My mother in Real Life. I dont remember though if i changed the difficulty when i first started it 21 years ago...

FUCKING STICKYKEYS

Ninja Gaiden Black anyone?

Last boss from Hard Reset: Exile DLC... On insane... less then 0.1% of owners of this game got him xD

Skeith in .hack//infection, i found a guide to this game that suggested to have almost every item in the game at max number in ur inventory and to be like 25-30 level higher than u are when when you meet he at the finish of the game...

A memorable one was the Normal Type gym in pokemon gold. That miltank was a right pain.

Vergil from Devil May Cry 3, at the end, dayumn, on any dificulty he is kinda hard to beat.

The Spider boss in King's Bounty - Warriors of the North. Such a ridilous pain.

Cold Fear last boss, after countless ammount of attempts, i just uninstall it.

Sapphiron pre 3.1 .....
with guildies asking "can i buy the frost resist gear in AH?"

The Bank, in Monopoly

Yelena in Deus Ex: Human Revolution... Tried it twice then gave up on the game. Shame really: the game itself is fun to play, the boss battles not.