Acheron is an upcoming modification (mod) for Battlefield 2142. The overall goal of the mod is bringing the legendary weapons of the US Colonial Marine Corps to the game and possibly even the xenomorph species as an opponent and a battlefield that takes place in the Hadley's Hope complex on the planetoid LV-426, also known as the Acheron.
"When tasked with creating a main theme for Acheron, I originally set out to re-create the scores of the films exactly. However, this proved to be rather challenging, so instead, I decided to come up with something original. The way I saw it, Acheron has its own place within the Aliens universe, although not official canon, and so I felt it was deserving of its own unique soundtrack. I tried to stick as close to the feel of the Alien franchise, hence the use of elements of the Alien: Covenant OST that you might recognise. After quite few attempts, this is what I came up with. It captures the tension as well as the raw emotion explored within the franchise. The main theme of Alien is survival, or at least thats what I take from it, and I think this conveys that quite well."
Here's the first piece of the soundtrack for Acheron. Composed and performed by our amazing music creator NinjaTheCat.