The Children of the Green God are a fictional race created by Chaosium in 1994 for the Call of Cthulhu RPG, which was based on Ramsey Campbell's The Horror Under Warrendown.
The Children of the Green God are a race of degenerated mutated humans. Whose children have elongated ears, sharp rodent-like teeth, large eyes, and coarse hair covering their bodies. They shun the light and movement is via a hopping gait. Quick and agile, they usually flee when confronted, unless you threaten their lairs or encounter large groups of them.