The third one is a total reference to the Gone series, I feel it in my gut.

Either way, I think these are all great ideas, but the first two would be somewhat hard to manage and here's why. In my experience with Fate series, Hunger games, and other of these style roleplays, one of a few things happens. Either, you don't have enough people sign up to start the story (which wouldn't be much of a problem in 2 bevause Battle Royale did not require a certain amount of participants for it to run) or people would get into very intense debates over the deaths of their characters and others. Since the first two are technically fight to the death style roleplays, you'd have to set a system where every character's move must be reported to you before it happens and you become somewhat of a game master and you judge who can and cannot be killed. And while I get that we're all mature here, if anything this past month has shown me that not everyone is as mature here as I thought they were so the arguments that have broken out in the past are bound to break out here as well. So as awesome as the ideas for 1 and 2 are, I wouldn't advice doing them based on my personal experience. I'd still join either one if you did do them, but just know how difficult those will be to run.