Post-apocalyptic refers to a genre of fiction or a scenario that takes place after a catastrophic event has drastically changed or destroyed civilization. This event could be a nuclear war, a natural disaster, a pandemic, or an alien invasion. The focus is often on the survival of humanity and the challenges faced in a world where societal structures have collapsed. In post-apocalyptic settings, themes of survival, resource scarcity, and human resilience are common. Characters may navigate through desolate landscapes, encounter mutated creatures, or form new communities. Popular examples include movies like Mad Max and video games like The Last of Us, which explore the struggles and adaptations of people in these harsh environments.