TemplarGFX's ACM Overhaul Mod is the best thing to happen to ACM. Unfortunately it crashed the game on certain levels especially on multiplayer. ACM Overhaul also does not contain all possible graphic corrections and corrections in Aliens AI. I have spent many hours messing with this and believe I have the optimal settings while combining the 2 configs and have found fixed the random crashes on certain levels.

As everyone has different GPUs, so you will need to add yours to the PecanCompat.ini file. To do so follow these instructions https://www.pcgamingwiki.com/wiki/Aliens:_Colonial_Marines#GPU_detection_fix

To do: Test fully with Stasis Interrupted.

Thanks to the hard work from Templar and Patrxgt. Original mod links below:

https://aliensoverhaul.mattfiler.co.uk/
https://community.pcgamingwiki.com/files/file/1926-aliens-colonial-marines-ultra-config/

For the highest fidelity you can use the included Inspector Profile that included enabling HBAO for Nvidia and 8xQ Sampling. Choose either the default or 0x00000021 and decide which suits you.

Good luck on the bug hunt!

How to install:

Install TemplarGFX's ACM Overhaul Mod (details in the link)
Replace the .ini files in your Documents\My Games\Aliens Colonial Marines\PecanGame\Config folder. Easy peasy.