So I am not sure how Haleks feels about this, but last night I took it on my own to get Ravage to work in MP. With a little bit of working with the files, a friend and I enjoyed playing Co-oP without any problems. I wanted to post, not to tell others how to, but rather to report bugs.
The first thing I noticed, and I am not sure if it is in SP too, not all loot crates have items. In SP I thought every one I found did, in MP not all of them. It did not have to do with the crate either, some bags had stuff, some didnt.
Second thing, and I see it has been noticed already, no sound after respawn, this seems to be the major killer here.
Third, zombies seem to be weird in choosing who they want to chase, unless I actually get in the way of them, they will chase my friend no matter how close I am. (Again, unless I step in front of them)
As far as any gameplay bugs, none that broke anything. Good framerates, and no glitching that I have seen.
I will not be releasing how I got it to work, out of respect for the Dev, but Haleks, if it is alright with you, I will continue to post any more bugs I find while playing MP.
No files will be released, no info on how to, and I will not help anyone that wants to play MP.
Thanks for the awesome mission Haleks, best zombies for arma yet!