is it only me or challenges are really difficult?
 

the first necrovision had some difficult challenge rooms but this one is a lot harder!! while the story mode is easier, challenges are very demanding.or something is wrong with me?;)

and another thing,just now i completed the last challenge(killing the doctors) and that was surprisingly so easy.i thought the last challenge is the most difficult one,same as the original necrovision!!

Well i've only tried the first challenge, the jumping/flying zombies one, but i found it quite easy.
I think i actually finished it with a minute or two to spare. But i do remember the challenges from the original, and as you say some were pretty damn hard - So i expect to find some difficult ones in this too.

I really wish we had another serious uncle sam challenge. now that was fun. :)

serious uncle sam :)the challenge which we had to kill 500 enemies,yeah that was fun:-P

hehehe. serious 500 challenge gives me cramps. I deathgrip the entire time while playing. so I actually still haven't been able to complete it. not tried any of the lost company challenges yet though, nice to hear they're hard

I don't want to boast or bash you, but I think something is wrong with you. I remember drenching my mouse with sweat on SUS (that one was fun) and untouchable challenges.
In nvn:lc, no sweat, litteraly. I had some difficulties with the mad duck hunter ('coz I stupidly wanted to play fair) and stuffy hall (always ended at ~90 frags), but they weren't really hard.

yeah i have to admit that something's wrong with me.i'll try harder next time!!!

Just finished the last open challenge.
If using some sort of tactics they can all be beaten.
But i never finished sus in original necrovision, i always ran out of enemys, nevern understood why this happened.