* Client - This contains the two Half-Life client update images. The larger of the two (hl1101.exe) will  update your version of Halflife regardless of what version you currently   have installed.  The smaller (11001101.exe) will only update your version of  Half-Life if you have 1.1.0.0 installed.

* Win32 Server - This contains the two files neccesary to host a Win32  Half-Life server.  The larger file (hlserver4101.exe) is the full standalone  server package for Half-Life and Team Fortress 1.5.  The smaller  (hlserver41004101.exe) will update your Half-Life Primary Server if you have version 4.1.0.1 installed.

* Linux Server - This contains the two files neccesary to host a Linux  Half-Life server.  The larger file (hlds_l3101.tar.gz) is the full standalone Linux server package for Half-Life and Team Fortress 1.5.  The smaller (hlds_l3101upgrd.tar.gz) will update your Half-Life Primary Server if you have version 3.1.0.0 installed.

Here are the mirrors: Client update: (Shack, Stomped, BluesNews) Client full package: (Shack, Stomped, BluesNews), Win32 Server update: (Shack, Stomped, BluesNews) Win32 Server full package: (Shack, Stomped, BluesNews) Linux Server update: (Shack, Stomped, BluesNews), Linux Server full package: (Shack, Stomped, BluesNews)