I don't think you will be able to do a "good" Dark Urge. From the RockPaperShotgun preview :
Some of the Urge’s setpieces have a dissociative quality. At one point, while passing through a druid’s grove, Ding encouraged me to go and say hello to a squirrel. Before I knew it, the camera had snapped to a nearby tree, just in time to see the squirrel’s body splatted against the bark. It’s a scene that demonstrates Larian’s growing confidence with cinematic staging - distancing you uncomfortably from your own actions by keeping them out of frame.
Yet the squirrel was just the start of it. Back at camp, I tucked myself into bed, only to discover a brutalised corpse of my own making during the night. There followed a sequence in which I was given the option to marvel at my handiwork, wash my hands of blood, and hide the body in the bushes. Most intriguingly of all, the whole sequence played out beyond the view of my co-op partner - leaving it up to me to confess the crime, or not. It strikes me as a classic tabletop dynamic - with one player given the choice to hide their cards, and delight in the transgressive glee of keeping a secret from the table.
