I figured I might as well update my list with information since that's what everyone is doing.
5. Gravelord Nito (Dark Souls)
This boss was really cool, and REALLY difficult. The Lord of the Dead is a collection of skeletons, floating around with a haze of black humanity around it, with a giant-ass sword and an army of undying skeletons serving him. This guy took me at least 10 tries to kill, just because his skeletons kept ganging up on me!
Eventually, you'll find that the strategy to this boss is try and get behind him at every change possible, and if the skeletons try and gang up on you, get them close to him and then run away when he begins to do his AoE spell which will hit all of the skeletons and give you a clean 10 seconds to attack him unhindered.
4. Ninhilath (Half-Life)
*See TJB
3. Gwyn, Lord of Cinder (Dark Souls)
This was the final boss in all of Dark Souls, and it was really enthralling. Not only do you have to pass through the Fallen Land of the First Kiln which had turned to cinder and ash, but then when you face him, he isn't big, or humongous, or anything you'd really expect a Dark Souls fight to be.
He's relatively human-sized. And most things human-sized get thrashed quite easily, but not Gwyn. At this point in the game, you've murdered his sons and daughters, his friends and enemies alike, you've claimed his kingdom and you've every Lord he's ever associated with until he's the only God left.
And when you walk in, there's no grace, no opening cutscene like in other bosses, just Gwyn, running at you with a burning sword, to a
song which feels like the boss has some meaning.2. Beatrix (Final Fantasy 9)
I just really like FF9.
And you never win against Beatrix, ever. She's too good.
Accurate music to how this boss plays out.1. Ornstein & Smough (Dark Souls)
Perhaps the most difficult boss in all of Dark Souls. It's 2 on 1, first of all, and this is really the point of the game where you either stop sleeping and spend your nights trying to deduce the best route of attack, or give up and live a life of eternal shame.
This is the most foreign-looking boss in all of Dark Souls. You battle a Dragon Slayer with an electric spear named Ornstein, and a large executioner with a big hammer named Smough. They've been given the quest of protecting Princess Gwynevere, and are the last battle which stands in the way between the Chosen Undead and the Lordvessel.
Their attack pattern is insane. Ornstein will run at you as fast as he can and try and slice you in half with his spear, while Smough lags behind and rushes at you with his absurdly large hammer and flies into the air to try and land on you and crush you. And when you kill one of them, the other will finish him off and absorb his power, so you end up fighting either a giant Ornstein or an electric Smough, whose kills will pretty much destroy you in one hit.
This boss fight took me quite literally
40 tries. I ran out of humanity trying to spend it on fighting them. At this point I was playing a piece of meat in a pile of metal armor, and I had to learn what clothes would help me roll faster and dodge their attacks better. This boss fight was perhaps the most rewarding boss fight I've ever fought in a video game.
Oh, and
the theme song completely matches my feelings during the boss fight.