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Old 09-23-2017, 01:50 PM   #11
Gef
 
Join Date: Sep 2004
Location: Yucca Valley, CA
Default Re: Need some help with an alien race

Hi Awarnok.

First a tangential point: A cheetah with 8 legs wouldn't be faster; it might be slower. Extra legs help with broken or soft ground. Sounds like these critters have it for mud. Big feet would help just as much though, with lower metabolic cost. Are these critters genetically engineered?

Your best build uses Alternate Advantages.

One set, 8 Legs (Horizontal -10%, No Fine Manipulators -40%, 7) and MV +2 (Horiz/NFM; 5), Terrain Adaptation: Mud (Horiz/NFM; 2). These is the cheaper set, so at 1/5 normal cost, that's 3.

The other set gets expensive, but you can reduce it, something like this:

Quad Extra Arms [Short -50%, Missing Digits 4 Thumbs -20%; 24].

That's net 27. As a GM, you can choose to phase in the extra move and terrain adaptation depending on how many limbs are on the ground. Also, you can change the details; the point is that AA is the technique.

Now here's a quirk of the system: It's not canonical to use Alternate Metatraits, so any disads bundled into a conformation have to be treated as temporary disads. However, GURPS is a Rule Zero game, which means you can figure out what the different conformations are, estimate their utility, and spitball the price.
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Old 09-23-2017, 02:55 PM   #12
awarnock
 
Join Date: Oct 2014
Default Re: Need some help with an alien race

They aren't genetically engineered, they're an alien species. They don't live in swamps and seeing as they are supposed to be pretty good engineers and mechanics they'd have an aversion to mud if only because it's a pain in the butt to clean out once it's gotten into something.

As for the moving faster, it's more about their gait than the number of legs. They can book it faster than an average human because they can take longer strides. I imagine seeing them running would be like watching a caterpillar on speed.
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