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

[Som1Lse]

WARNING: POSSIBLE SPOILERS IN THE ENTIRE POST AND CAPS IN THE FIRST SENTENCE!

We've all seen those tech feature blog updates from Frictional Games.
Some of them are really great especially if you want to make a Custom Story.

I have also got a few ideas.
Please note that not all of these ideas are meant to be for any upcoming game and some of them are merely just speculations on new kinds of gameplay.
Do not flame me for any of those reasons. since I do know, that some of them are not something that will be added recently and that some of them may seem completely impossible.

1. Dynamic decals:
   Everyone who uses the editors knows what a decal is. Or well, at least most.
   There is a spilled wine decal, and we have probably all seen it.
   If you haven't then check out Daniel's room (also known as guest room) and check the left room (the one that isn't locked) there are some broken bottles near the chimney (or whatever it is called) and bellow them is a spilled wine decal.
   
   Now that's pretty realistic, but one thing that is weird however, is that when you pick up a bottle and throw it the bottle breaks but there is no spilled wine or anything.
   
   My idea here is that it would be cool if you could assign a decal to an entity and then when it breaks it generates that decal.
   
   We also know that when you try to place a decal on a non-static entity (like a chair) and then move it, the decal flies in the air.
   If you could set a decal to dynamicly update, so it wouldn't fly but rather stick to the object, then it would be cool
   
2. Massive Endings:
   Some of you might have tried out Heavy Rain.
   It has 18 different ending sequences that can be combined in numerous ways.
   And every sequence changes a bit depending on how you played the game as well.
   Frictional also seems to like multiple endings, but their multiple endings so far as all been like you get a final choice in the end of the game.
   In heavy rain all the decisions are not just in the final level but rather in the later levels in the game.
   In Amnesia there is one ending (Agrippa ending (also known as good ending)) that requires you to complete a short puzzle before hand, but it is rather simple and is only done on the levels right before the end. (no complaint, it is still well made)
   I think it would be cool if there were more possibilities in endings in possible future games as well as possible future custom stories.
   
3. Horror Multiplayer
   Admit it. You have all played other games in multiplayer mode, but it isn't really scary since you always have a chat build into the game as well as a headset so you can talk with your team mates.
   
   Well what if there were no chat and the only communications you had were talking and shouting, and what if the sound volume decreases he farther you were from each other.
   
   Imagine playing the Choir with 5 of your friends.
   You could choose to go to each room together one at a time or split up into three groups and take them all at once.
   Also imagine that you lose the rest of your group and have to find your way back.
   
   Of course the Amnesia storyline doesn't really allow this kind of gameplay but it would be cool, wouldn't it.
   

I will add more if I get any other ideas.