From Serial Killers Introduction:
Designing NPCs is long and tedious work. High level NPCs can take hours to fully stat out, especially in modern games, which demand multi-classing at higher levels. And that doesn’t take into consideration the time it take to give your villain a motivation and history. The Armed and Dangerous! line takes that work out of your hands and puts it in ours.
Our NPCs come with detailed histories and believable motivations. This is where most of the work goes. Our characters aren’t just cookie cutter villains, they’ve got histories, they have personalities, they have stories that you can integrate into your games. We also give you notes for using the characters and advice on leveling them up or down.