A cross between Eldar Scrolls and Grand Theft Auto. I'm not trying to type every thought I've had on the subject but keeping it related to guro...

Well, the Saints Row when the main character goes to Hell... that's something interesting. An open world rpg where you can hire allies or command an army and you have ao many powers.

It could even start realistically and you have to be careful to not die but eventually you get godhood and can just torture infinite numbers of people or even create creatures as tools or playthings. It should allow every sort of torture and everybother sort of real world activity. Like lowering someone into lava or cutting them...

Getting to see HQ realistic guro of artillery strikes and people falling from tall buildings while naked on fire... mmmmmm