God's Lost Children, or GLC as they are more commonly known, were a heavy metal band that briefly achieved a degree of fame in 1987 when they released their album Unspeakable (presumably a reference to Hastur). They performed six dates around New York before three band members were killed during a riot at a gig in Jacksonville, Florida in February that year. They were inspired by the mysterious Turner Codex. More information appears in Delta Green: Eyes Only.