Installing Third Party Mods

If you have a Half-Life mod installed before installing Steam, Steam will automatically convert and install the game for you.

It will then be accessible in the Steam "My Games" list under "Third Party Games."

NOTE: ALL THIRD PARTY GAMES FOR HALF-LIFE 1 ARE INSTALLED UNDER "HALF-LIFE".

So for example, there will be folders (just a few example names):

• C:\Steam\SteamApps\<account>\half-life\action
• C:\Steam\SteamApps\<account>\half-life\aghl
• C:\Steam\SteamApps\<account>\half-life\bg
• C:\Steam\SteamApps\<account>\half-life\biglolly
• C:\Steam\SteamApps\<account>\half-life\firearms
• C:\Steam\SteamApps\<account>\half-life\underworld
• C:\Steam\SteamApps\<account>\half-life\valve

If you want to add a Half-Life mod after installing Steam, you need only to put it in the Steam/SteamApps/<account>/Half-Life directory.

For Half-Life 2 mods, you need to install them in the following directory.

C:\Steam\SteamApps\SourceMods

The next time you open the "My Games" list, it will be listed under "Third Party Games."

If updates for your 3rd party MODs become available, you will need to manually install the updates.

If you get an error about your client.dll is different from the server, this is a good indication that you might need to update your 3rd party MOD.

For a list of popular 3rd party MODs that will run under Steam, please click on the "Browse Games" tab in your Steam menu, then look at the third tab: "Third Party Games".