Our main supported platform is Steam release of Half-Life (Windows and Linux. macOS is not supported).
Secondary supported engines: Xash3D-FWGS (Windows and Linux. Android is not supported yet) and WON version of Half-Life.
If you report bugs or crashes, please specify your operating system and the engine that you played on.
If you have missing textures, check the value of the r_wadtextures cvar in console. It should be set to 0