Cyberpunk literature encapsulates the genre's essence by representing technology integration and human existence in a dark, impending future. It shows a society rife with disparities and introduces unconventional heroes who navigate a world where the boundaries between the virtual and tangible realms. The primary objective of this research is to examine the representations of Virtual Reality and Alternate Reality in cyberpunk literature, mainly focusing on Neal Stephenson's "Snow Crash." The focus lies on how this significant work illustrates the portrayal of virtual and alternate realities in American science fiction, viewed through Postmodernism Literary Theory. An extensive discussion revealed that "Snow Crash" is a platform for addressing societal issues through its sturdy framework, examination of human interactions, and ethical considerations. It allows writers to explore intricate ideas, particularly emphasizing the significance of technology and scientific advancement. This exploration delves into the transformative potential of technology on society, ethics, and human experience, allowing for insightful social commentary. Also, "Snow Crash" mirrors societal shifts in scientific, technological, social, and cultural aspects affected by economic systems like mass consumerism and multinational capitalism. It embodies a paradigm that vividly portrays postmodern ideology, challenging established notions, especially concerning identity, within postmodern societies. Finally, the study's implications and limitations are discussed.