Multiplayer/Co-Op & Frictional Games? NO!!!

[Cruzore]

There was (of course) a topic about this already. I myself thought the same as many others "No way you can get a good experience with an amnesia co-op" but the ideas you said, if they could be implemented, it would be 1 awesome co-op game. It would definitely not go near amnesia in horror-wise, since you don't have such immersion when you have a friend with you, but it may get close when you have such things implemented like "friend can't hear you that far" and such. And the option to either save your friend or betray them in the first possible way will increase suspiciousness after a few games, and you'll learn that you can trust nobody(which is, when you achieve that within a horror co-op game, a very good thing I think). I would definitely play such a well made co-op.
I can imagine playing penumbra:overture in co-op and stuffing beaf jerky in the pockets of my "ally" or in amnesia when my ally is in the other side of the room, I would throw a box near him so the monster wouldn't go after me first