Half-Life 2 has been updated for its 20 anniversary. Fixes, new bonus content, and even incorporated its expansions into the base game. It is also FREE right now, so if you still haven't played it for some reason, the time is *now*. https://store.steampowered.com/app/220/HalfLife_2/
@dosnostalgic Oh, not really, it didn't. That was an incomplete early version of the source code and cannot be compiled to a working game on any platform, anywhere, even using the tools of the time, much less any modern compiler. There is not enough there to port to any working platform. It would be a little bit better than developing your own game from scratch, except it wouldn't work. I really appreciate the suggestion, though, because it made me think and stare at code for a while, and that's always fun.