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Security Powered Combat Vest

Originally posted by half-life.fandom.com:

The Powered Combat Vest, commonly abbreviated as P.C.V. is a protective vest worn by the Marines of the Hazardous Environment Combat Unit and Military Police, over which the LC-2 Harness is worn.

• A restylised H.U.D. similar to that featured in Half-Life: Opposing Force with a new digitised font and new armour icons to suit that of a P.C.V. (Powered Combat Vest)
  
• The H.U.D. has been recoloured to match the colour scheme found in Half-Life: Blue Shift, more fitting for a Security Guard!
  
• Pitched down H.E.V. voicelines to sound more like a male to match with the P.C.V.
  
• Security Guard viewmodels have been ported over from Black Mesa's Multiplayer mode.

• Firstly, locate the Steam Workshop folder typically in the directory "C:\Program Files (x86)\Steam\steamapps\workshop\content".
  
• Locate and Open the folder "362890". (Black Mesa Addons Folder)
  
• Locate and Open the folder "2192736259"
  
• Copy the file "securitypcv.vpk" and paste it into the "Custom" folder you set up in the guide above.
  
• NOTE: Due to the way the Workshop handles sounds they will NOT work unless you enter in "snd_restart" in the console everytime you load up the game OR unsubscribe from the mod after placing "securitypcv.vpk" into your "Custom" folder, maybe like and favourite this instead? ;)

• Addons that recolour the H.U.D.
  
• Addons that alter weapon viewmodels (Weapons, arms, hands, etc.).
  
• Addons that change the H.E.V. sounds.
  
• Addons that change the Health and Armour Icons.

• HECU Powered Combat Vest by Ysubby
  
• ANALOG HUD v3 - Gamma by fentconnoisseur & blender