Genre Definition: Sci-Fi stories use scientific understanding to explain the universe they take place in. It generally includes space travel, time travel, computers, machines, alternate universes, alien life-forms, genetic engineering, etc.
Sub-Genres include: Apocalyptic/Post-Apocalyptic, Hard Sci-Fi (detailed, well researched and plausible), Soft Sci-Fi (dealing more with cultural, social, and political interactions), Space Opera, Cyberpunk, and all other punks.
Sub-Genres include: Apocalyptic/Post-Apocalyptic, Hard Sci-Fi (detailed, well researched and plausible), Soft Sci-Fi (dealing more with cultural, social, and political interactions), Space Opera, Cyberpunk, and all other punks.