The Cthulhu Mythos of H.P. Lovecraft, or Cthunisystem for short, brings some of the classic elements of Call of Cthulhu role-playing to Cinematic Unisystem. Compiled by Salvatore Cucinotta and Jason Vey, it’s a great resource for adding mythos monsters and a different flavor of spell to your Unisystem games.
By default, it’s written for Cinematic Unisystem games like Buffy the Vampire Slayer and Angel, but it’s super easy to use the monster quicksheets with classic Unisystem rules, or extrapolate backward to a full stat block. Shave off any Drama Points the creature may have and call it good.