Half-Life High Definition Content

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This addon is avaliable for download. Enter steam://installaddon/halflifehd in your address bar to install. You can remove it with steam://removeaddon/halflifehd.

The High Definition Model Pack for Half-Life was the model pack included with the Blue Shift installation of Half-Life (which allowed for various model packs, such as ones made by users). With the release of Blue Shift on Steam, the model pack was added as an on-demand update (although it was never mentioned).

Note that nothing will happen after you follow the installation link until you run one of the Half-Life games.