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  3. Half-Life 2: The Masked Prisoner (mod)

Half-Life 2: The Masked Prisoner (mod)

Posted on August 6, 2026August 8, 2026 by admin

The Masked Prisoner plot

  • explores the untold stories of several Half-Life characters, set in a prison on the outskirts of City 17.
  • Original mod created by: Mike Anderson

Instructions

Download and install The Masked Prisoner in sourcemods, which is located in:

Steamsteamappssourcemods

If you are using the Synergy 4.3 beta, you do not need to do any additional steps other than subscribing to the addon.

Then copy the folder named 860392418 located in:

Steamsteamappsshopscontent17520

and paste it into: SteamsteamappscommonSynergysynergycustom.

Method 2

If you have Synergy installed in the default directory and you are using a 64-bit machine, you can use this command in cmd.exe to make things easier:

robocopy /E “%programfiles(x86)%Steamsteamappsshopscontent17520860392418” “%programfiles(x86)%SteamsteamappscommonSynergysynergycustom860392418”

^ This should be on one line, copy it, then right-click the cmd.exe window, click paste and press enter.

Mac Instructions

Right-click the finder icon, select “Go to Folder” and type:

~/Library/ApplicationSupport/Steam/SteamApps

In this folder you will find the common, source and workshop. Download and unzip The Masked Prisoner to source, download this addon, and copy the folder in shops/content/17520 under the name “860392418” to: common/Synergy/synergy/custom. When you launch Synergy, you should see The Masked Prisoner in Create Server, as well as be able to join servers that have it.

See also:

Half-Life 2: Wilson Chronicles

Dangerous World Half-Life 2

Half-Life 2: Minerva Mod

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