Hey guys please don't worry about the engine, thats really something which is "future".
Tweak please read the posts posted before, then you will get the answers to most of your questions
So lets stick with evolving the setting and storyline, gamemechanics and so on.
Since SPECIAL is one of the copyrighted things Beths owns, we have to change that in some ways.
I gave it some thoughts and the SPICERS came out
AGILITY is just altered in REACTION, so nothing really new here.
It will alter it only mainly in one point, that is exchanging LUCK with SANITY. Though LUCK will still be part of the character since there will be two traits for it, as in Fallout luck was mostly interesting in situations with extreme huge or low luck.
This new attribute has great potential, especially in dialogs, storyline, visuals maybe. Think of one character who has low SANITY and really weird Dialog options, or he actually sees things that are not really there. It could have effect of how gory enemies get killed. It could hve effect on many skills too. Dunno, like it? =)
storything: so NuLife is some technology company brought in through the USA, they build the many shelters in Europe, the char is one of the inhabitants? So the char would also can get the ultimate spandex, but maybe altered in some ways, instead a number some kind of sign on the back, instead of blue it could be red =)