As weird as it might sound, don't you just love a good serial killer storyline? It's part of the reason shows like CSI and Criminal Minds managed to explode to incredibly high ratings and reviews only a few years ago, and they've continued to keep their fervent fanbases that love piecing together all the clues and pieces of evidence along with the cast. In games it's pretty hard to get this sort of thing right, as for the vast majority of players aren't secret agents or detectives, so it falls to the developers to flag things a mile off, or make it fairly obvious what needs to be put together to implicate who. The newest - and very much underrated - Sherlock Holmes title Crimes and Punishments ended up giving players 'Sherlock Vision' to make sure elements in the surrounding world stood out enough to be noticed, whereas L.A. Noire left things up to the very real-world idea of studying peoples' faces and emotions to tell if they were lying. The latter was a great idea in theory, but in execution some cack-handed interrogation-mechanics made for a very broken experience. Regardless, the very idea of tracking down that one totally insane person who's had their mind and motives warped beyond repair is one of the most thrilling premises in any medium, and luckily gaming has seen its fair share of disgustingly vile characters that need bringing in too - providing we're not the ones playing as them.