Yet every sound is from half-life. Interesting.
The imitation of the source engine default sound is intentional... Not sure if its gonna be replaced after the game finishes but, it serves as narrative medium to convey to the player a familiar yet otherwordly sound(Think of it as world being constructed and source games have that vibe because they are always in WIP).. Fits in the theme of the game as its deconstructs the notion of Humans figuring out existence as whole..In Voices of the void, the world is all a jumbled mess of Esotheric and Science fiction as angels,demons, gods,anomalies and aliens and other entities all seem to be attracted to this particular forest and seem to be just as curious as the humans...