Its a concept, as I can't really work on it (no time, army service takes it all.)
But the more I play fallout 3 the more I see it work well as a tabletop game.

True it will need many rule variations (action points instead of simple action types is one), but it got skills, perks (similar to feats), abilities ("SPECIAL") main way of getting up the ladder of xp and wealth is combat and questing, and the environment is fatal enough to allow random encounters and dangers of the road.

The game will require lots of new perks, guns etc, and possibly a rebalance of quite a few, but it CAN work, its a perfect match, just waiting for someone to go ahead and do it.

If anyone thinks of taking the leash of this, jest a minor request-let me take a part when I can.