Most difficult levels in existence?

[BitBuster]

From my understanding of gaming, again in my opinion, a skilled player should be able to clear any level (given its fairness) on his first try, knowing what he's doing.

"Commit Suicide?" is one of my favorite CCLP3 levels, even though no one is going to get it on their first try (unless they've looked at a map).

The thing is, you can use logic to figure it out eventually. The long run of chips in the corridor after the force floors are a dead giveaway; actually, I think the level would have been better if there had only been two or three chips there. It would have made the solution a bit more difficult to discover.

Anyway, the level's not based on pure guesswork. You don't have to scrounge all over the map for hidden buttons that have unclear consequences, and you don't have to unlock a maze of doors (most of which have traps buried underneath them).