Black Mesa Sound Effects Copyright Question

Hi. I noticed a thread on this forum mentioning that most of the sound effects in the game (bms_sounds_misc) were royalty free and that the license.txt mentioned a CC BY-NC license. I just wanted to clarify since my project is a bit different than the one mentioned in the post:
I’m working on a project that involves making an underground facility in UE4, that would be controllable by users. They could run “experiments”, operate shipments, security, etc and control the facility’s systems. I wanted to use some sounds from the black mesa files since they fit in perfectly. The game will be free to use, but I will accept donations if the user chooses to (this is all considering the project comes through with anything - it’s very early in development).
My question is, am I okay to use some sound effects from the game files under this, would I need to not accept donations at all, am I not allowed to use the sound effects, etc?

I’m not sure if this helps, I had a similar question some time ago for a Doom project I’m still working on, I’m not sure if it’s dependent on the source of the audio files since I have maybe a 0.2% comprehension of legal stuff.
But this is a response I had on the issue regarding sound effects.

Founded in 2004, became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.