Navigation in audio-only first person adventure games is challenging
since the user has to rely exclusively on his or her sense of
hearing to localize game objects and navigate in the virtual world.
In this paper we report on observations that we made during the
iterative design process for such a game and the results of the final
evaluation. In particular we argue to provide a sufficient number of
unique sound sources since players do not use a mental map of the
virtual place for navigating but instead move from sound source to
sound source in a more linear fashion.