From a PDF in the series:
INSTANT ANTAGONISTS are systemless creatures or beings designed for use in existing modern supernatural/horror games. Many will be supernatural in nature; some will be (at least nominally) human. While one antagonist may be truly evil, others are simply selfish, immoral or may even be victims themselves.
Looking for a new twist on an old legend or trope? This product is a perfect addition to a GM's modern horror game collection. The INSTANT ANTAGONISTS line offers details on each monster's origins, powers and plenty of story hooks to include them in your campaign or evening's session.