Dwarves: "Dwarves in Space" in Dragon #70 (written to take AD&D Dwarves into Traveller [~520 year life-span, adult at 60], but can be modified to be a "Gene-geneered" MHR [with a more normal life-span] specifically designed for ship and belt life).
Their reduced life support requirements allow smaller living spaces (.75X deck height, full floor space) and less food/water/air consumption (also .75X), thus reducing building costs of ships & habitats (and leaving more tonnage for other uses) and reducing re-supply needs.
Quaddies: from Lois McMaster Bujold's Falling Free... another "Gene-geneered" MHR, they have 4 arms and no legs (since legs are much less useful than arms in free-fall).
They were designed before the development of small artificial-gravity fields, and also have their entire circulatorily system adjusted for "Zero-G". They have severe problems in anything above 1/4G, and can die if in a gravity field of 3/4+G for an extended period.
Their life-support requirements are .5X food, air, & water, due to the lower exertion levels of Zero-G living. They need .65X living volume (.75X deck height, but use all surfaces for storage, equipment, etc.).
-2 str, -2 end, +2 dex, +1 int, +1 edu
normal arm/torso/head size, but weight is -10% due to arms being smaller than legs
most have musical or performance skills
Heavy-worlders: from Anne MacCaffery's books... another "Gene-geneered" MHR, they are much larger and stronger than normal humans.
They can easily live in 1.25-2 G environments, but have a shortened life-span (adult at 16, average ~80). They are normally muscular, with a low body fat level... males average 7'-8'6" and 280-380 lb, females average 6'6"-7'10" and 230-310 lb.
Their life-support requirements are 2.5X food (2X if primarily protien/meat) and 2X air & water. They need 1.5X living volume (1.25X both deck height and floor space).
+3 str, +3 end, -1 dex (no negative modifiers until 1.3G or greater), -2 soc (usually expected by "normals" to be mentally slow, and tend to be channelled into "brawn, no brain" careers and jobs)(they value strength and endurance over intelligence, and tend to be dismissive of "weaklings"... i.e. most other beings)
-1 for all physical tasks attempted in less than .25G (in addition to normal Zero-G DMs), -1 at most repair/tech skills (LARGE fingers)
The nice thing about "Gene-geneered" MHRs is that they are in addition to the official MHRs (since they are not planted by the Ancients, but are modern creations), and you can make as many as you want.
Treecats: from David Weber's "Honorverse" books.
Int: 5-7 (exceptional 8 or 9)*; Edu: variable, usually 2; Str: 2-3; Dex: 8-12; End: 4-6
Language skills possible, but lack vocal apparatus to form complex sounds so limited to comprehension of spoken languages... written/visual languages (such as signing) can be learned & used (with appropriate equipment as needed)
Length: .5-.75m body, 1-1.5m overall (males toward the large end)
Weight: 6-10 kg male, 5-8 kg female
6 limbs (2 hands, 2 hand/feet, 2 feet) + prehensile tail (full strength), 3 fingers/toes + 1 opposing thumb
Life-span: ~250 years (adult at 50, ageing from 150 in 10-year increments); bands on tail appear at ~20 years, add one per 5 years thereafter
Hits: 3D(2D)
Move: 2X
Claws: 1D+1 (2/4 attacks); Teeth: 1D+1
Carnivore (partial omnivore)
Arboreal (uses ground nearly as well)
Pouncer/Gatherer
Communal
Tech level: 0-1 (homeworld, native society)
*telepathic (own species); empathic (own species and most other satient species)... can form empathic bond with some humans (9+ int, strong moral sense), with an empathic range of 250m (long), and a direction sensing range of up to 50 km (very distant)... long-term bonding appears to enhance Int, and empathic transfer of emotions is somewhat common in long-term bonding
# all author's ideas used without permission, like most "home-brewed" fiction-to-game adaptations #
