Gibbous: A Cthulhu Adventure is a comedic point-and-click adventure game that pays homage to classic LucasArts titles and the works of H.P. Lovecraft. Players navigate through a quirky narrative filled with bizarre cultists, ancient voodoo, and the infamous Cthulhu. The game features three unique protagonists: Detective Don R. Ketype, who is on a quest for the Necronomicon, Buzz Kerwan, a librarian whose accidental discovery of the book transforms his cat into a talking creature, and the cat herself, Kitteh, who seeks to return to her normal life.

The gameplay is driven by exploration and puzzle-solving, with a focus on humor and engaging dialogue. Players will encounter a variety of challenges as they unravel the mysteries surrounding the Necronomicon and its impact on their lives. With its charming art style and witty writing, Gibbous offers an entertaining experience for fans of adventure games and Lovecraftian lore.