If you've seen Higurashi no naku koro ni, and haven't seen Umineko yet, I highly recommend it. Umineko's got most of the intrigue and atmosphere like Higurashi, but a completely separate set of circumstances surrounding the setting.
The anime is currently nearing the end of the Second Arc, while the VN is currently at the Fifth Arc. The anime is set to cover the first 4 arcs, with a likely second season later. The VN Arcs are released every Comiket or so.
It's got all of the same graphic depictions and expressions as well if you missed those. I've barely said anything about the plot, but I wouldn't want to spoil anything.