GURPS : Mythos Races The Fungi From Yuggoth (Mi-Go)
	"...I saw the body spread on that dank stone, And knew those things which feasted were not men; I knew this strange, grey world was not my own, But Yuggoth, past the starry voids - and then The body shrieked at me with a dead cry, And all too late I knew that it was I!" - H.P. Lovecraft

Summary

The Fungi From Yuggoth, or Mi-Go, are an extra-dimensional, interstellar species steeped in the abhorrent rituals surrounding a variety of godlike entities collectively known as the Great Old Ones. They have been present upon Earth for some 160 million years, and have been conducting a variety of experiments upon homo sapiens in that time. According to Daniel Harms' Encyclopedia Cthulhiana, they first saw print in H.P. Lovecraft's short story: The Whisperer in Darkness. They have since been described in great detail for Call of Cthulhu Role-Playing Game in the published scenario A Resection of Time by Sam Johnson. An entire Chapter in Delta Green from Pagan Publishing is devoted to their bizarre nature, and the out of print chapbook Delta Green Eyes Only Volume One: Machinations of the Mi-Go by Dennis Detwiler further delineates the strange deceptions that the Mi-Go inflict upon humanity. It is largely from these sources that the following material is derived.