Some people have already compiled the engine and have it up and running, so far theres alot of problems with it, but people have managed to load a simple enviroment with a single texture into the engine.
alot of the basic console commands are the same as those in Half Life1 so it simplified alot of things.

once its compiled, the engine doesnt have any text, so you cant see any text or even the text you write, but people have managed to fix it.

In order to compile the code you need Visual c++ and service pack 5.

According to rumors that are based on nothing but here say, if a full playable copy of the game was stolen, it will be released later on this week,
C++ Should Have Been Called "D"