What is the hardest boss in Video Game History?

[Sheepocalypse]

A Quiet Exit, I think it's called.

Yep
forget that mission

[Ad Bot]

[Nonnel]

GIYGAS WAS HELL

[blueblur121]

GIYGAS WAS HELL

this

[Copy Kirby]

loving CLYDE IN THE CALDERA IN PACMAN WORLD 2. forget HIM AND THAT STUPID LAVA

[Pastrey Crust]

Also Federico Papalardo from Mafia II. I had to drive a car into the warehouse and use that as cover to beat him. He's harder than Carlo Falcone.

[Zloff]

rainbow road from mario kart

[Lego lad]

this guy was a pain when i was a noob on the first monster hunter game (ps2)

eventually i defeated him with the Assassin Dagger, now hes super easy

[Duck Quackington]

a badmin in blockland

[Yosher]

the lingering will from kingdom hearts 2, probably. haven't defeated him yet and i don't plan on trying anymore because he's a cheating bastard

i can do decent damage before he starts doing that thing where he puts a seal on some of your commands, or that thing where he holds you and your Attack/Magic/Items/Drive commands turn into Escape/Fall/Fall/Fall and the Escape command constantly warps around and if you choose wrong, you die

[cooolguy32]

the lingering will from kingdom hearts 2, probably. haven't defeated him yet and i don't plan on trying anymore because he's a cheating bastard

i can do decent damage before he starts doing that thing where he puts a seal on some of your commands, or that thing where he holds you and your Attack/Magic/Items/Drive commands turn into Escape/Fall/Fall/Fall and the Escape command constantly warps around and if you choose wrong, you die

There is actually a easy trick beat him, I haven't actually done it, but https://www.youtube.com/watch?v=7iX4qtTbN2o

[Sitrus]

The last mission in MGSV:TPP
if you count literal forgettons of tanks as bosses

You can count the aimbot one hit kill tank as a boss

[VerticalHorizon]

Mike Tyson in Punch Out!

[rambo1220]

The last mission in MGSV:TPP
if you count literal forgettons of tanks as bosses

each tank was a boss on its own like the forget why does one tank need an entire stache of rockets

[cooolguy32]

Mike Tyson in Punch Out!

[IsaacKronenFaust]

each tank was a boss on its own like the forget why does one tank need an entire stache of rockets

Max grade recoilless rifle took them down in about three shots, I think. I just wish that mission were reasonably doable with non-lethal weapons and stealth, because that's how I almost always play.