It's amazing what mods can do for a game. They can add content, extend games, and even make something completely new for gamers to enjoy. They can also fix problems that developers don't have the time, budget, or inclination to address
That's what this mod is all about. Titled "TemplarGFX's ACM Overhaul," it introduces a host of fixes to the gameplay of Gearbox's poorly-received shooter. Not only does it make the Xenomorphs faster and more aggressive, it re-balances a number of other systems as well. Changes have been made to weapons, ballistics, lighting, decals, and more.
The mod's description on ModDB says,
"Experience Aliens: Colonial Marines how it should have been when it came out. Heavily Balanced and Play-Tested for exciting, suspenseful and most importantly, FUN game play."
If you've always wanted A:CM to be more than it was at release, this mod may be the answer for you. Check it out at ModDB.