The steaminstall.exe file you have requested: Official Releases / Steam / Steam installer - 689.99kb is not available. Perhaps try browsing all files for the game Half-Life and upload any files you want to share or are missing. This is the only information we could locate:
The latest Steam installer (v18.104.22.168).This will only install the Steam program itself, you'll need to download the games through the Steam program. You can use this when you're experiencing unsolveble problems with the cached installers we've provided.