Despite the increasing prominence of Klossowski's philosophical work, there exists no full-length or sustained treatment of his writings on Nietzsche. This study analyses Klossowski’s semiotic of intensity as a conceptual foundation for his philosophy and interpretation of Nietzsche, grounded in the central principles of his theory of signs. It then explores its implications for the categories of chance, causality, individuation and time, drawing a series of parallels between Klossowski's texts and the work of other scholars, such as McTaggart, Eco, D. Z. Albert, M. Silverstein, Meillassoux, N. Land and J. Stambaugh. Throughout, this work lends accessibility to Klossowski's often opaque and idiosyncratic style. It should be relevant to anyone interested in Klossowski’s philosophical work, in contemporary Nietzsche scholarship, or in the 20th Century linguistic and existential Continental tradition.