Didn’t Mises think little of Game Theory? It seems the original game theorists, von Neumann and Oskar Morgenstern think more like Austrians.

As a mathematical discipline travels far from its empirical source, or still more, if it is a second or third generation only indirectly inspired
by ideas coming from ‘reality’, it is beset with very grave dangers. it
becomes more and more purely aestheticizing, more and more purely
l’art pour l’art. This need not be bad, if the ield is surrounded by
correlated subjects, which still have closer empirical connections, or
if the discipline is under the inluence of men with an exceptionally
well-developed taste. But there is a grave danger that the subject will
develop along the line of least resistance, that the stream, so far from
its source, will separate into a multitude of insigniicant branches, and
that the discipline will become a disorganized mass of details and
complexities. in other words, at a great distance from its empirical
source, or after much ‘abstract’ inbreeding, a mathematical subject is
in danger of degeneration.
– John von Neumann (quoted in Dore et al 1989, xiv)

They’re often classified as Austrians actually.