Weekend Open Forum: Most memorable videogame boss fights

Quiet a few. But few specifically.
1) The Sentinel (Battle Engine Aquila). My very first boss fight. Took me 42 minutes straight. And I survived on 2 blips of armour!
2) 343 Guilty Spark and Sentinels (Halo 1, 3). No explanation needed. "Wake me...when you need me"...
2) Jack of Blades (Fable: The Lost Chapters). Damn long the first time. 2.5 minutes the next time. But a very memorable fight.
3) Archimonde (Warcraft III: Reign of Chaos). For obvious reasons. Anyone who knows WC3 knows why.
4) Illidan (WC3: The Frozen Throne). Same as above.
5) Ritter (Soul of Darkness). Just for the touchy ending.
6) Basilisk (Harry Potter and the Chamber of Secrets).
7) Orachimaru (Naruto).
8) Magician (House of Dead).
 
Man, this thread could get huge....Here's mine:

Sorceress Ultimecia: Final Fantasy VIII
Omega Weapon: Final Fantasy VIII
Zodiark: Final Fantasy XII
Yiazmat: Final Fantasy XII
The End: Metal Gear Solid 3
The Boss: Metal Gear Solid 3
Psycho Mantis: Metal Gear Solid
Liquid Snake: Metal Gear Solid
 
I remember beating Metroid, and being super excited only to find out you had to jump out of that giant shaft, and that made me so nervous, as it took me a long time and basically luck to beat the boss, and the prospect of having to try to repeat it was not something I wanted to do.

The most memorable boss fight that I didn't get to, however, was in Super Mario Bros. I usually could only get so far before I ran out of lives but one time, about 30 minutes before my friend's mom was supposed to come pick me up, I got lucky on that turtle trick on whatever level, that ended up giving you extra lives, so I jumped up and down (I was 10) as the lives collected up to 99.

So I start breezing through the game, playing far more recklessly due to all the bonus lives, so after losing about 40 of them I'm pretty close to finishing the game. By that time its the time that my friend's mom was picking me up to take me to his house. She hated to wait, and she was lazy (no cell phones in those days), so basically I had to be outside at the appointed time in order to get picked up. I play a few extra minutes, but about 5 minutes after the time I was supposed to be outside, I reluctantly turned off the Nintendo and the TV and started walking outside.

Just as I was about to step out the door, the phone rings. I run to pick it up, its her, she ran late doing something, and just got back to her house, so she wouldn't be there for another half hour or whatever. I was really upset. Didn't end up beating Super Mario Bros until about 20 years later when I loaded it up on a NES emulator on my computer.
 
Maybe the harrier in Metal Gear Solid 2 and Alma in Very Hard in Ninja Gaiden. The ones than comes to my mind now.
 
the first most memorable was Gannon from legend of Zelda Ocarina of time. and second most memorable is baal from D2 LOD.
 
The one that still stands out for me even though it's a newer game, relatively speaking, is the Last boss fight in Metal Gear Solid 4 on top of the tanker(?) don't remember what it is but for the sake of not spoiling anything it's that one. Hope you all know what I'm talking about.
 
Mizar from Jet Force Gemini on the Nintendo 64. Kind of a run of the mill boss battle mechanically, but the world level and environment of the final battle was memorable.

Next to this is the Moonlight Butterfly from Dark Souls. Again, nothing special from a mechanical standpoint, but the design of the boss and the atmosphere in this battle is one of the best I've seen.
 
Bowser!!!

(and kids) from Super Mario World specifically. Must've played through that game 100 times or more!
Super Mario 3 gets a close 2nd. The fact that you could get to multiple Bowsers through glitches was epic.
 
I nearly quite literally pissed myself the first time I came across this thing, my only thought...."RUN AWAY....RUN AWAY!!
 
Sorry, I was referring to a comment regarding the Cyberdemon from doom(the original)
 
I think every boss fight in Metal Gear Solid history deserves this honor but two stick out in particular. Beating The Fear on extreme difficulty using only the tranq gun was sooooooo hard. Also, the End was just a memorable fight. At any second, he can off you with one shot (on extreme).
 
<p>the dragon in every level end in nintendo's super mario brothers :)</p>
<p>(yeah, I'm THAT old)</p>
hah yeah super mario 2 egg shooting dragon was epicly odd, jump on top of a hostile projectile, pick it up and throw it back at the boss?!!! at that time it was unheard of, many monocles were broke
 
Loki from Ghouls n Ghost on the Sega Genesis was a ***** to beat and that is not counting that you had to play all the levels twice before getting to him.
 
@Marnomancer
Instant flashbacks of the magician fight in house of the dead 2, forgot how much I loved that, and how you had to fight lesser versions of every boss so far to get to him.
 
Suikoden 2, Luca Blight

you had to go through an unwinable map battle - after you get to damage his unit twice he teleports away and in the process dealing damage to everyone in the map

then three, count them, three party battles. six people on each of your team. If you haven't levelled some people up, you're scraping the bottom of the barrel when you're selecting the thrid roster

then a one-on-one battle. That part was technically the easy battle since you were given clues as to what his next attack was but I didn't know that when I first played through and I had terrible level and armour that I had to go through all of that again because I died multiple times.
 
Final fantasy VI (3 US)
Do not miscall this holy relic.
best game ever ;)
 
The ****ing clown from donkey kong 64.

Actually, all the bosses from DK64 were pretty memorable.
 
Tsarkon the 2 headed final boss thing from Sword of Vermillion around 1991. It was memorable because it was the first RPG I ever played and it was on Sega Genesis. Was hooked on RPGs and video games in general since then.

Still remember me shouting for help and my wife trying to guide me through the early parts of the game with the guide book while I played (should have read it first but who RTM?) as I had never played anything like this game - ahhh good times.

Many of the Final Fantasy bosses stick in my mind and also that one from Ratchet and Clank.
 
A few that stand out:

The titular Exodus from Ultima 3;
Minion from Twisted Metal II;
Diablo from..Diablo;
The giant vehicle spewing multiple tracking munitions all over the screen, from every Japanese scroll-shooter ever;
Heh, <I>every</I> boss in Serious Sam I and II. Lunacy!
 
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