The world of Delta Green is filled with more than just humanity. Each of these races is worthy of closer inspection, and more than a little fear.
These races have been mentioned in "official" Cthulhu Mythos stories, though their properties in Delta Green might be unusual.
- Deep Ones
- Elder Things
- Fire vampires
- Flying polyps
- Great Race of Yith
- Hounds of Tindalos
- Moon Beasts
- Serpent people
- Autopsies of various nasties (external link).
There are many stories of nonhuman beings in the real world. Aliens, faeries, and monsters: humans have told stories of their existence throughout the ages. Any Mythos creature might hide behind these stories.