We present a novel computer game-based framework for phonetic perception experiments. We employ the game environment of a first-person shooter game where players interact with and respond to animated creatures in different virtual environments. Whenever the player encounters such an animated creature, a sound stimulus is played and the creature changes its color depending on the type of stimulus. Throughout the game, colors are getting harder to distinguish until the two creature types (corresponding to two stimulus types) are virtually identical in color. Data can be collected in various ways and without the need for specific additional tests. A first pilot study was conducted in which the game was well received by the subjects and which already highlights the potential of this investigative framework.