morolf: According to the linked video the Gonarch fight takes 30-45 minutes in the remake. Sounds like a terrible idea tbh.
The whole thing is a bloated mess. Stay away.
(I wish I could be more positive about Black Mesa, it's very obviously a passion project and a lot of blood sweat and tears went into making it. It's just that the thing is no fun at all. And I'm not some hardcore purist who thinks that Half-Life is some flawless masterpiece, there's lots of things that could be improved. Instead, they turned the bad levels into great looking but aguably even worse levels and added all sorts of superfluous shit to the good levels that takes away from the experience. There is some cool stuff too, they really built on some of the concepts that aren't really explored in the original game when it comes to environmental storytelling. But unfortunately, it's just such a slog to play through, so I can't really recommend this to anybody. People who prefer HL2 to HL1 might be the closest thing Black Mesa has for a target audience.)