Here is a list of downloadable single player Half-Life 1 mods. All these
mods have been played from the beginning to the end at medium skill, without cheating. The
first column indicates the date when the mod has been downloaded. If a Half-Life
version number is given, it means that the mod does not work with version 220.127.116.11
(Steam). If you can't find a download link for a mod,
let me know, I still
have all the files. The Opposing Force mods names are followed by this
All links verified on 30th of March 2020.