"Welcome to Cathulhu (say cat-thoo-loo), an alternative setting which approaches Call of Cthulhu from a cat's-eye view! These additional rules connect the traditional Call of Cthulhu RPG with a feline milieu inspired by Akif Pirincci's Felidae and other novels."
A sub-genre rule expansion for Call of Cthulhu.
The German version was re-released in October 2013 as a pdf. It includes all rules, character sheets and two additional adventures:
Die Spur der Schwarzen Katzen (The trail of the black cats) by Ingo Ahrens
Der Fluch des Rattenwesens (The curse of the rat creature) by Frank Heller