The document discusses various sub-genres of psychological thrillers including conspiracy thrillers, crime thrillers, disaster thrillers, mystery thrillers, political thrillers, religious thrillers, supernatural thrillers, and techno thrillers. It also outlines some common codes and conventions used in psychological thrillers such as deceptive mind games, flashbacks, tensions music, perceptions of reality and existence, and visual iconography involving shadows, confined spaces, running water, fears, mirrors, and low-key lighting.