If anyone is nostalgic about HL2 and want's revisit it, I highly recommend Black Mesa remake, it's mind blowing in a good way.

While you got the Black Mesa remake confused, HL2 did get a free 20th Anniversay Update a couple years ago: https://www.half-life.com/en/halflife2/20th

So it's still worth a revisit :)

Isn't Black Mesa Half-Life 1?

I believe you're correct, and the Half-Life wiki seems to support that: https://half-life.fandom.com/wiki/Black_Mesa_(game)

Oh, sorry, you are correct. My brain melted a bit in a heat :)

Yes, but with several asterisks.

* Graphics are better (this should not be a surprise)

* Some maps have been made shorter (the underground railway tunnels, if my memory serves)

* The last part of the game (Xen) was pretty much completely overhauled, and in my opinion, improved.

This is from memory so I might be getting one or two details wrong.

What did you like about it?

Very competent rework with good graphics.