I know this theory is nothing new, but I saw some videos dedicated to the topic, all of which provide decent enough evidence. So, here we go.

1. The static

At certain points in the full game, static will appear. This can take on two colors: red or white. Some people think that the white static is indicative of Rebecca, who mind you, is the person who became Amanda. They claim that, whenever Amanda goes off-track or remembers something, white static will appear. As for the red static, that's the entity. Now, I've actually looked, and yes, this might be the case. I'll give examples. In What's a Family?, if you repeatedly type no when Amanda asks you to help the kitten, red static appears. Meanwhile, in the corrupted version of In Your Neighborhood, when Amanda recalls something bad happening, white static appears.

2. Oh No! Accidents!

In the corrupted version of Oh No! Accidents!, Amanda is preparing to do surgery on poor Wooly. Now, one could argue that this is because the entity is controlling her, but there's no red static, not even when you constantly get answers wrong. In the end, Amanda is successful in taking out Wooly, which brings me to my next point.

3. Out there somewhere

After Amanda kills Wooly, you get a puzzle, which when solved, gets you the final tape. Now, based on the original build of the game, you'd think Amanda might try to break into Riley's home, but nope, she's completely passive and asks to share a secret with you. There are 3 possible outcomes:

A. Say no and leave without consequences

B. Say yes

C. Same as b, but you now have all colored tapes.

And remember, you can only get this tape AFTER Wooly is out of the picture.

There is one problem with this theory though, and unfortunately, I can't explain it: going back to the corrupted version of Oh No! Accidents!, there's one frame where Amanda, who looks to be partly in her monster form, is attacking Wooly. If you have any ideas what this means, please share.

So yeah, that's the theory. If you agree or disagree, please let me know. And, I'll gladly take any criticism.