Black Mesa [Half Life 2 Mod]

[Zipppy]

You are correct, it is a 3d shooter, but this one differs quite a fair bit from the ones you mentioned. the game this is based on itself, is still among the most played to this day, and it was released over a decade ago, (even the sequel is among the most popular as well, and has revolutionized other things) It's the basis for many gameplay mechanics and plots in many games today, regardless of genre. So basically, the base game revolutionized the industry, as the sequel.

I still don't understand on how it could be forgotten so quickly, even with some legendary music groups which have come and gone in the past.