Most difficult levels in existence?

[M11k4]

What are the most difficult levels to solve that exist? What makes them difficult? Which ones have you completed?

I would think there's at least two types of difficulty here: hard to find a solution and hard to execute a solution. Of course some levels can be both.

I'll make a list too, just don't have it right now.

[AdrenalinDragon]

I'd say the majority of Pieguy's and KeyboardWielder's levels are probably the hardest overall.

[Hornlitz]

So, let's see here...

YCTaOFNT fits for both extremely well, and I've solved it.

Bloblake is hard to execute, and I haven't done that one.

Lounge Act, Plug In Baby, and Gimmick Isle part deux fit in both, and I've beaten them all.

Suspended Animation fits both too.

I'll find more later.

[quiznos00]

Plug In Baby

Plug In Baby was never intended to be, nor is it, a challenging level

[Hornlitz]

Plug In Baby was never intended to be, nor is it, a challenging level

Well OK fine. It's hard to figure out, but easy-ish to execute.

[rockdet]

I'd say Block Buster in MS, for reasons similar to Bloblake.

[jblewis]

There's also the levels that are difficult for reasons beyond the minds of us mere mortals: "the most insane level ever!", etc.

[rockdet]

the end of all time would be another one.

[James]

Minustwo.dat level 8.

[rockdet]

modulo 14