Chaosium
used–~$15, new: $38
junior high up, should be considered PG or PG-13
low
American Lit, Science Fiction, Horror, 20th Century Lit, 1920s History
as many as desired
No. Each player is a single character.
2-4 hours (making characters is the hard part to learn)
30 minutes.
as desired
This is a role-playing game and free-form. It explores the horror mythos of H.P. Lovecraft which inspired Stephen King and other writers. References to Cthulhu are quite frequent, including Arkham Asylum in the Batman cartoon series.