The 2019 Steam version is built from the previous 2013 steam version, saves are interchangeable.
no idea where or what it is.
no idea how to obtain it, see it, or where it's used.
probably would be good to have a save game, know where the save game goes, and how to look at draw and where it's at.
The only thing that was kept from the 2000 PC version, was the audio and movies. They had to do models etc from scratch, most of the data was lost in 2000 along with other titles of the time.
I wish they spent more time on the map models to make them look a bit sharper, but their main goal was to be true to the original.