Hardest boss in video game history

[Genesis88]

Absolute virtue and Pandemonium warden

[SirTaint]

AV was quite the boss. The theory crafting, 1000s of attempts, and huge threads where LSs actually traded strats and secrets.

[Vantol]

Absolute Virtue, no doubts. Unfortunatly I doubt we will ever see something like that again. Once in a lifetime, eh?

[ScummyGuy]

Lunar: Silver Story Complete. Just about every boss was a pain because you couldn't just level higher to beat it because they would level with you. I was also young and didn't know how to figure out mechanics. Probably the only RPG I quit without beating.

[Blazer]

Absolute virtue and Pandemonium warden

Pandemonium Warden @ 75 cap pre nerf 18hours and still alive.

[Truefaith87]

Not an RPG like everyone here is comparing.. But final boss of echo the dolphin for the sega genesis. 40min long stage, no checkpoints, no health recovery, millions of super fast projectiles being shot at you.

[Kal-El]

Error 90k can be a bitch to beat!

[Ri_ri]

Lunatic Byakuren imo.

In MMORPG, I think probably heroic Ragnaros... I've not even beaten his normal version.

[Ispen]

Demi-Fiend/Hitoshura in Digital Devil Saga was a pain to beat.

[Meshico]

I guess one of the hardest bosses I have ever fought was Emerald Weapon in FFVII. But I wasn't capped, and I didn't have Knights of the round...and it was like a 4 hour fight, where i just kept summoning Phoenix for as long as I could, basically I didn't have the proper set up, and it was a darn good fight

Which I eventually won

Also hardest game I've ever played...Resident Evil - Hard - Chris