It was the blackmail thing, it was the night crawler "rapey" scenes at night as well. It was the possibility of Sara being underaged when it clearly says all characters are over 18.
There's worse games out there than this, but this one, I feel, was made an example of. So Celia's route is gone, the nightcrawler rapey scenes are gone (you can still wake them up), dialogue has been changed. The type of school the MC goes to is now a college (because of the Sara thing)
so yeah, it's a shell of what it used to be.