Apocalyptic and Post-Apocalyptic Fiction:
Concerned with the end of civilization either through nuclear war, plague, or some other general disaster. Post-apocalyptic fiction is set in a world or civilization after such a disaster. The time frame may be immediately after the catastrophe, focusing on the travails or psychology of survivors, or considerably later, often including the theme that the existence of pre-catastrophe civilization has been forgotten (or mythologized). Post-apocalyptic stories often take place in an agrarian, non-technological future world, or a world where only scattered elements of technology remain. There is a considerable degree of blurring between this form of science fiction and that which deals with false utopias or dystopic societies.
Biopunk
A story that is about genetics and biological research (often falling under the horror category). It often focuses on some harmful effects characters have created when they change an animal's code to (unintentionally) create a violent monster. Biopunk emerged during the 1990s and depicts the underground of the biotechnological revolution that was expected to start having a profound impact on humanity in the first half of the 21st century. Biopunk fiction typically describes the struggles of individuals or groups, often the product of human experimentation, against a backdrop of totalitarian governments or megacorporations which misuse biotechnologies as means of social control or profiteering. Unlike cyberpunk, it builds not on information technology but on synthetic biology.
Cyberpunk & Postcyberpunk
A futuristic storyline dealing with people who have been physically or mentally enhanced with cybernetic components, often featuring cyborgs or the singularity as a major theme, and generally somewhat cynical or dystopian (hence the "punk" portion of the name). This is often confused or placed with Techno-thriller, which is actually a separate and less specialized genre.
Like its predecessor, postcyberpunk focuses on technological developments in near-future societies, typically examining the social effects of a ubiquitous datasphere of computerized information, genetic engineering, modification of the human body, and the continued impact of perpetual technological change. Unlike "pure" cyberpunk, the works in this category feature characters who act to improve social conditions or at least protect the status quo from further decay. Some critics suggest has evolved from cyberpunk.
Like its predecessor, postcyberpunk focuses on technological developments in near-future societies, typically examining the social effects of a ubiquitous datasphere of computerized information, genetic engineering, modification of the human body, and the continued impact of perpetual technological change. Unlike "pure" cyberpunk, the works in this category feature characters who act to improve social conditions or at least protect the status quo from further decay. Some critics suggest has evolved from cyberpunk.
Steampunk
A story that takes place around the time steam power was first coming into use. The industrial revolution is a common time frame which steam punk stories take place in, and the steam technology is often actually more advanced than the real technology of time (for instance, Steam Detectives features steam-powered robots). The most immediate form of steampunk subculture is the community of fans surrounding the genre. Others move beyond this, attempting to adopt a "steampunk" aesthetic through fashion, home decor and even music.
Planetary Romance
The bulk of the action consists of adventures on one or more exotic alien planets, characterized by distinctive physical and cultural backgrounds. Some planetary romances take place against the background of a future culture where travel between worlds by spaceship is commonplace; others, particularly the earliest examples of the genre, do not, and invoke flying carpets, astral projection, or other methods of getting between planets. In either case, it is the planetside adventures which are the focus of the story, not the mode of travel.