I agree with Outland, is a must see, and while it's not official, it could easily be happening in the Alien universe.
I would say that the Dead Space series is somewhat similar to Alien and can be mined for ideas (there are also a few books and comics): few alien species, gritty setting where humanity is scrapping by mining asteroids and distant planets, no empire, no magical tech, etc.
There's a french comic which is also interesting, some parts of the comic itself where directly inspired by Aliens: Zéro absolu (in English as Absolute Zero) by Richard Marazano and Christophe Beck.
Also, the System Shock videogames have some interesting ideas to explore, it's hard sci-fi and more focused on the cyberpunk aspects of it, particularly AI, but could be used as a reference to create a campaign where MOTHER or Apollo are the nemesis.
The "Hammer's Slammers" books series could be good inspiration for a Colonial Marine or military campaign. I guess some aspects are a bit outdated by today's standards, but it's quite good.
"Ah, but a man's reach should exceed his grasp, Or what's a heaven for?"