Yeah, I'd like to do 3 of the Expert Campaigns (I got through Blood Harvest about 2 hours ago, man...what a tale). I also need help with Back 2 Help and some other achievements.
Here's what happened on the final part of Blood Harvest:
We're at the barn, and the Power Shot is first brought to my attention. So after learning how to do it and testing it out myself, we go and do our thing. First tank comes, and I power shot the tank...well...would have if my teammate didn't get in the way the instant I fired, killing him in the process. Yeah, not going to end well.
So, near the end a second tank comes and he's climbing on the power generator, and me and my friend are trying to shoot the tank but our Power Shots won't go, so we have to charge them more. The tank gets in our faces and we both power shot him at the same time for a quick KO.
The rescue vehicle is here, so we go down and my friend gets pounced on by a hunter somehow. I kill the Hunter, and he tells me to go towards the vehicle. As the ramp is being lowered I jump up and I get stuck so I'm meleeing these Zombies my health going down and I somehow manage to pull myself down then jump back on the ramp and into the vehicle to clear the Campaign!