
while disturbing, it would explain a lot.
I saw a theory on this site that she was actually dead throughout the game, because Mama killed her. Maybe she's just a very heavy sleeper, but it seems strange that we don't see her at all in the game. Some have theorized that (one of) the dead bodies in the trailer is the kid's father. It's pretty clear the kid's mom is around, seeing as the last command before the good ending is to wake mother. Where are this kid's parents? Could it be that they are the dead bodies hidden in the trailer? Who are we playing as, anyway?. But really, your guess is as good as mine. They had to sell the ritual because of budget cuts? I mean, the recession's hittin' everyone. So you missed one? Mama's back because she's missing a baby. He guessed that Mama is programmed to see eggs as her babies, and that she couldn't rest until she found every. It says she found "every last one" of her children, and put them back to sleep.
According to a theory I listened to, the cassette tape hints at the reason.Maybe the Ritual in the bad ending failed/wasn't as effective? Then again, the Ritual looks the same in every ending, so.