I’ve actually told people NOT to play HL1. Anyone who’s entered the FPS gaming community within the last 3~4 years and loved HL2, I’ve straight up told them that HL1 is tens years old, and looks it. Black Mesa is going to be a far superior representation of the Half-Life universe than HL1 is currently. Of course the caviot is that HL1 was ground breaking in it day, and remains a major milestone in FPS gaming history and deserves it’s due respect.
But the general idea I leave people with is this: “If you started with HL2, then think of Black Mesa as the upcoming Prequel to HL2.”