So, yes, you can actually play this and it is actually a lot easier and also, I have to admit, more fun than "goodie two shoes" playthrough, BUT, you have to pass a shitload of dice roll checks on dialogs and preferably ally with goblins and Absolute UNTIL you reach Nightsong. Then you can do whatever the shit you want from there on. No constraints. Because of this, the best starting character obviously is Dark Urge IMHO