I got the "Sub" ending this time, so I've got the Sub and the Knife now or Endings #5 and 6 judging from the save screen. This one it didn't really seem to put me any closer to figuring out the identity of Zero or the killer. In the knife ending several people got killed, then Junpei, and he sees his killer, but doesn't seem shocked. In the Sub ending everyone dies, so you think, well it's gotta be a 10th person/persons. Buuuut, this isn't my first rodeo, I've read And Then There Were None. You didn't really get a chance to carefully inspect most of the bodies, so some one could have faked their death. And The 9th Man and Snake's bodies were both badly mangled, leaving some leeway there for some fake corpse switcheroo. But I still don't have any idea whodunit, so I'll let that lie for now.
What I can make out is that apparently 9 years ago, 16 children were kidnapped. All the children were patients at a hospital that was run by Cradle Pharmaceuticals. The children were subjected to mind-control/telepathy experiments, and then 9 days later were returned to their parents. Although I don't know everyone's story yet, I think it's probably safe to say that everyone was involved in this incident somehow. So far what I know (assuming what I've been told is true):
- Seven was a cop investigating the kidnappings, got kidnapped himself, found the kids, doesn't know what happened after that.
- Lotus' two daughters got kidnapped. This led her start her own investigation.
- Junpei and June are the same age as Lotus' daughters. Could they have been kidnapped too, and maybe blocked out the memories? Or at least, maybe they could have known one of the victims.
- Santa was looking wistfully at a picture of a sister. Another possible kidnapping victim? He also made a lot of money buying and selling CP stock.
- The 9th Man seemed like he knew a little bit that everyone else about what's going on. Also, just the way he looked makes me think mad doctor, so I'm thinking that maybe he was one of the doctors that performed the experiments.
- Ace, Snake, and Clover are still mysteries, I'm not sure yet how they fit in.
Okay, so if everyone is connected to the kidnapping, then what is Zero's angle? It seems like the Nonary Game is bringing out details about the past that have been buried for years, could this be the purpose? Maybe Zero wants the past to be uncovered for some reason, and set up this elaborate game to expose the truth.
Then we have the killer. It's seems pretty obvious that Zero isn't the killer, because it doesn't make sense that Zero spend all this time setting up this game, and then just stab people in the back. So maybe the killer is somebody that doesn't want the truth getting out. Maybe someone responsible for the kidnappings and experimenting. If that's the case, it would probably be one of the older people, and if we take Lotus and Seven's stories as truth, that would seem to cast suspicion on Ace. Could he have been a CP exec maybe? Or maybe a doctor himself?
So, let's throw everything into a big pile and see what comes out...
Joe Molotov's Grand Theory #1: Zero wants to expose the truth about Cradle Pharmaceuticals. For fun, we'll say that Zero is really Santa. He's deceptively smart, he's a numbers guy. CP did something bad to his sister and he's going to expose them. But he's just some punk kid and he doesn't have enough evidence, nobody will believe him. So he becomes the "Black Santa" and sets up this elaborate "trick" to expose the truth. Ace is the President of CP. He doesn't want his dirty laundry exposed, so he's going to kill everyone else before they can figure it all out. And because there's no way it's that simple, I'm going to throw in an extra twist. Junpei and June were two of the kidnap victims from 9 years ago. They've been brainwashed into forgetting what happened, but on command, they can still be telepathically mind controlled. Ace uses them to kill the other passengers, and then to forget what happened.