Most effed up VN you've played or plan to play

I love edgy stuff. I have finished Kara no Shoujo and Kara no Shoujo 2 masterpieces both of them. Lots of blood gore and overall effed plot and characterss. Right now Im playing through Saya no Uta no spoilers please loving it a lot. Can anyone recommend me some deranged VNs like these I also started the 999 VN but thats on pause for now