When I reviewed Half-Life remake Black Mesa back in 2012, I said the project “does not look like a modern video game”. A newer (and far more limited) remake, Project Lambda, does.
https://lastchance.cc/black-mesa-the-kotaku-review-5944812%3C/a%3E%3C/p%3E
That’s…not much to actually get to play, but it’s the start of the game and you gotta start somewhere.
But it looks pretty good! Lambda’s goal is to rebuild Half-Life using Unreal Engine 4, and while the results are a little strange at first (it feels like a different art style), it’s definitely an improvement (in terms of fidelity at least) on Black Mesa
You can download the first chapter, and keep up with development, here