>a branch that is entirely value free

I think values are a little bit like the GPLv3. They virally propogate into anything they are even the slightest part of. So while game theory, as maths, is value free, its place in economic theory, its promotion, its funding, its employment, are all eminently value-driven. Seeing parts of a discourse as clean, free of value judgements is to misunderstand value judgements. Information without value has only analytical meaning. Every piece of synthetic judgement implies a value system - people telling you otherwise are generally trying to sell their values through dishonest means.