Fair distinction. Half-Life 2 SDK open sources a decent amount of code. Take a look at his source code, a lot of it is a re-implementation of Valve's map and

Fair distinction. Half-Life 2 SDK open sources a decent amount of code. Take a look at his source code, a lot of it is a re-implementation of Valve's map and model data structures in Javascript with similar naming convention. Hence why I called it a "minimal port" or "ported just enough components" to load a map.