Eh, I completed the campaign but it only says 50.8% done or something. I clicked resume hoping for an epilogue or something but it just restarts the last save. I'd assume other difficulty settings but..well. wouldn't it be 25% done then since I only completed it on 1 setting? I just don't get it. The special ops missions or whatever don't seem to connect, it's been sitting at 50.8% even after I completed half of the ones you can solo (my bro hasn't had the time for the 2-player ones with me yet).
As for insanely tough ones. Are you referring to the stupid snipers in ghillie suits one? That one is just so damn cheap on the hardest setting. I ALMOST did it once too. I just don't see how skill has anything to do with getting past the 2 ghille suit camping spots. I understand sometimes their area flashes just before they shoot you, but nobody can react that fast..Hell even if you could, the game just plain doesn't allow you to look down the scope in the 0.2 seconds after the flash before you get nailed before the sniper. What sucks even more is they are the only thing stupid soap does NOT go "beautiful" or "he's down" for when you kill one. So you just have to hope you got him, take a peek around the corner, and have a random chance of being wtfpwnt.
If that's not all, sometimes they randomly decide not to shoot for lengths of time. so you just assume they are all dead. Only to shoot later when you are nowhere near cover, or at the same time as another one who shot you. UGH.. That's how I died that one time, I was out in the open like 40m away from the ending, nobody was shooting me, so I went for the finish when blam, dead. @%@%#.