The alien invasion is a common theme in science fiction stories and film, in which extraterrestrial life invades Earth either to exterminate and supplant human life, enslave it under a colonial system, harvest humans for food, steal the planet's resources, or destroy the planet altogether.
Armageddon is, according to the Bible, the site of a battle during the end times, variously interpreted as either a literal or symbolic location. Used here to group fiction representing a final, apocalyptic war.
The Dying Earth subgenre is a sub-category of science fiction or science fantasy which takes place in the far future at either the end of life on Earth or the End of Time, when the laws of the universe themselves fail. Themes of world-weariness, innocence (wounded or otherwise), idealism, entropy, (permanent) exhaustion/depletion of many or all resources (such as soil nutrients), and the hope of renewal tend to pre-dominate.
- Darkness by George Gordon Byron, Lord Byron
- The Time Machine, 1895 by Herbert George Wells
- The House on the Borderland, 1908 by William Hope Hodgson
- The Night Land, 1912 by William Hope Hodgson
- Till A' the Seas, 1935 by Howard Phillips Lovecraft and R. H. Barlow
An impact event is the collision of a large meteorite, asteroid, comet, or other celestial object with the Earth or another planet. Impact events have been a plot and background element in science fiction since knowledge of real impacts became established in the scientific mainstream.
- After London, 1885 by Richard Jefferies
- The Purple Cloud, 1901 by Matthew Phipps Shiel
- In the Days of the Comet, 1906 by Herbert George Wells
- Valhalla, 1907 by George Long
- The Scarlet Plague, 1912 by Jack London
- After Armageddon, 1932 by George Henry Weiss
- The Defenders, 1953 by Philip Kindred Dick
- Second Variety, 1953 by Philip Kindred Dick