Either/Or Limitations

GURPS Power-Ups 8 p 6
essentially applies the Reciprocal Enhancements / Counter Enhancements rules.
==leveled weirdness==
This works best with things that have fixed costs per level if you want to use special grading rules. Stuff like Hardened is fine (static 20/tier) but stuff like Armor Divisor is complicated (varying prices per tier)
Inaccurate / Extra Recoil / Onset / Reduced Range / Easy to Resist / Increased Immunity / Short Range all have linear increases so that is possible.
Complications can arise when specifying which. For example "Onset or Easily Resisted".
Apparently you can specify which limitation. This is basically like activating the inverse limitation. Flipping usually requires switchable though, so that might make sense as a prereq for this, or for Alternative Enhancements.
==quotes==
===PK===
http://forums.sjgames.com/showthread.php?t=8504 thread explaining it from 17 September 2005
references P 130 of fantasy Cost of Divided and Restructurable Magery
:If a power has a limitation worth -X%, then you could think of not having that limitation as a +X% enhancement. You then limit the enhancement (with the second limitation).
http://forums.sjgames.com/showthread.php?t=8504&page=3 2005 
:mentions GURPS Fantasy and Restructurable Magery and how it is based on Limited Enhancements
http://forums.sjgames.com/showpost.php?p=121191&postcount=8 disambiguates with Alternative Abilities
:Alternative Abilities is a different animal, though. Note that I didn't say this was for powers in which you got to choose which limitation applied; it's for powers in which either you or circumstances decide. For example, say you're building an area effect knockout gas that's pheromone-based, so only females get a resistance roll. You cannot do that with Alternative Abilities; you have to "limit the limitation" instead. (Either Resistable or Accessibility, Males Only.) And many people may not realize that you can reverse-figure the enhancement-limiting rule for this purpose.
*let's say I was building a character with tough skin but an armored underbelly. I'd take DR with (Either Tough Skin or Vitals Only, -12%). If you'd have me buy that with Alternative Abilities, I'd have to choose each turn whether my vitals were protected fully OR whether my body was protected completely. No thanks.
**I'm not saying (A) this is some great breakthrough or (B) that I even came up with it. It's just something that I did the math on way back in 3E days and thought some people might benefit from.
==See also==
*Limited Limitations
*Not Naked
Category:Limitations
Category:Rules