[ghostly_s]

What's the point of using this xash thing then?

[jamesfinlayson]

For whatever reason, Valve doesn't want to open source the engine so some people have taken it upon themselves to build a reverse-engineered engine (which now runs on Android, in the browser etc).

[pilif]

It’s open source and runs on all kinds of platforms. Original HL1 runs on old Windows and IIRC DOS. Nowhere else

[skhr0680]

Valve updates HL1 every few years so it runs on contemporary platforms. DOS was ancient history by the time HL came out, you might be getting it mixed up with Quake1