● Settings: futuristic, other worlds, subterranean earth, parallel universes, interplanetary warfare
● Alternative and/or future histories and evolution of humans on earth or on other planets
● Space travel, teleportation, time travel, faster-than-light travel or communication and any other undiscovered scientific possibility
● Aliens, mutants, androids, enhanced humans / cyborgs
● Brain-computer interface, bio-engineering, superintelligent computers, robots, ray guns, other advanced weapons and any other speculative technology
● Utopian, dystopian, post-apocalyptic, post-post-apocalyptic, post-scarcity political and social systems
● Mind control, telepathy, and telekinesis