WAfrofuturism
WAlien invasion
WApocalyptic and post-apocalyptic fiction
WBlack science fiction
WList of science fiction comedy works
WDieselpunk
WDying Earth (genre)
WHard science fiction
WMathematical fiction
WMilitary science fiction
WMundane science fiction
WScience fantasy
WOutline of science fiction
WScientific romance
WSpace opera
WSpeculative evolution
WSteampunk
WTech noir