Similar Sub-genres: FIRM SCIENCE SCI-FI, MUNDANE SCI-FI, NEAR FUTURE SCI-FI
As our referenced quote states in SFMZ's Sci-Fi Subgenres A to Z feature, Hard Sci-Fi refers to a particular emphasis on scientific detail and / or accuracy. Stories based on real science & engineering for the most part, it is driven more by ideas than characterization.
Near realistic science and technology are central to the plot. Stories in this broad subgenre depict technology that conforms to actual scientific knowledge and physical laws, or extentions of them that scientists consider plausible. The sub-genres below are included in this section since they seem to overlap with Hard Sci-Fi, or have common shared descriptions.
FIRM SCIENCE SCI-FI: Firm Science Sci-Fi refers to a midway point between 'hard' and 'soft' SF, and the inclusion of technology and /or phenomena that are not too fantastic, but may never be invented.
This subgenre could also include characters who are grounded in the real world along with their environment, but a unique element of enhanced physical capabilities or elevated powers of the mind exist.
MUNDANE SCI-FI: Mundane Sci-Fi focuses on stories set on or near the Earth, with a believable use of technology and science as it exists at the time the story is written. It features near-future stories, without any improbable technologies, or interplanetary settings, at least beyond what known spacecraft can reach.
NEAR FUTURE SCI-FI: Elements of the Near-future science fiction setting should be familiar to the reader, and the technology may be current or in development.