https://github.com/ValveSoftware/halflife is the HL1 engine, is it not?
That's just the SDK - which does include the game code but not the engine. Xash3D is the reverse engineered engine alluded to above.
alt Hacker News
That's just the SDK - which does include the game code but not the engine. Xash3D is the reverse engineered engine alluded to above.