User summary: The D20 Call of Cthulhu Lite document adapts the Cthulhu mythos (primarily fiction by H. P. Lovecraft) to a table-top game using the D20 OGL system. The source book establishes Occupations (Antiquarian, Criminal, Technician, etc.) which allow access to Skills. The source book adds an additional Attribute, Sanity, which starts at Wisdom x 5. A single character class (Investigator) is suggested for all players and is presented in detail. Additionally, a bestiary of "mythos beings" is provided.