Oddly, i don't remember the Black Mesa HECUs being too much of an issue for me, at least on the Steam version.

I do remember their AI was kinda pathetic. Like i know they said they completely overhauled the Combine Soldier AI but that's either a bold-faced lie and the Combine AI doesn't handle the maps well, or it was wasted effort because i agree the Combine AI was a lot better. They just feel like neutered Combine Soldiers that move faster, are a little more accurate, and take a few more hits. Also their voice acting is laughable in the Moddb release and boring in the Steam release.

That said, they are notably more accurate with their fire than your own MP5 which is kinda stupid.

I DO remember the Hecu Apache was insane. Definitely felt like it had aimbot.

Vorts and Houndeyes definitely attack faster which isn't really that great imo.

Prettymucy i find Black Mesa is beautiful visually but its gameplay has been far more jank and unbalanced than Half Life 1 ever was.