This is a Mod for Half-Life 1 MMod that replaces all the original Dialogues into the german original Half-Life 1 with some minor fixes and hearing now German Human Grunts instead of Robot Grunts. It also supports Uplink and Darkstar.
To Download this, extract the Half-Life MMod folder into "Steam/steamapps/common/" and make sure the "Allow Custom Addons" is enabled.