In the past few years, several experimental and theoretical researches have been conducted to define the concept of immersion and test the different levels of involvement a player may achieve at experiencing a video game. This paper describes the creation of a video game music soundtrack constructed from sounds of the environment of the game itself and the testing of the perception of this new form of game music in a preliminary experimental research with a determined number of subjects. The participants tested a stage of the OpenArena 0.7.6 game in three versions: without music, with music created using standard timbres and with the same music but created from sounds extracted from the effects of the video game. The results suggest a slight tendency to a high level of immersion with the use of the music from the environment.