Extract the .zip to steamapps\common\Half-Life\ and restart Steam to play.
- Disabled backface culling for models.
- Added monster_human_grunt_s (grunt with shotgun) and monster_human_grunt_g (grunt with grenade launcher).
- Added ai_disable to commandmenu.
- Added sv_physics to enable basic reaction to damage physics.
- Added move_to command (give it x, y and z parameters) to move an entity directly in front of you to specific coordinates.
- Added automatic content mounting of first party GoldSource engine games - no more copying files around!