Tekeli-li! (2002)

From Introduction:

"The universe is not only queerer than we imagined, it is queerer than we can imagine." —J. B. S. Haldane

This is a supplement for using Fuzion to run Lovecraftian horror, such as one gets with Call of Cthulhu, in either its Chaosium or D20 incarnation. Horror games, in other words, but a particular kind of horror: something slow, insidious, and wrong. It is not mad slashers chasing nubile teenagers; it is encounters with things that drive humans mad, and risking insanity to banish those things.

In H.P. Lovecraft’s fiction, Earth is an exception. The laws here are not the same as the laws Out There, and we, who have evolved in this benign environment, cannot stand the harsh light of reality.

Oh — Tekeli-li! was the cry of the strange beings that lived "At The Mountains Of Madness."