The most common method for installing addons is to subscribe to it, navigate to its workshop files in
and copy the contents of these files to
This should work in most cases, however some addons have their own installation instructions. Refer to the addon description, or the installation instructions below.

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This collection of addons includes the popular Black Mesa Character Expansion Revised addon, the HECU Realism addon, and BMS Classic addon, as well as a miscellaneous selection of quality of life or realism addons that complement the experience of the game. This does not include any addons that restore weapons or models to HL1-like replicas or HD remakes.

Another version of this collection exists that does not include any extra addons so that you can only use the ones you want to use:
https://steamcommunity.com/sharedfiles/filedetails/?id=2824596328

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The following addons can be installed simply by subscribing to it.

• 1.0 masked hecu voices remake
  
• Alternate Hivehand Location
  
• Better HiveHand
  
• Black Mesa Menu Music replacement (Black Mesa Theme (remix) - Morch Kovalski)
  
• BMS Classic - Full Game (v1.16)
  
• Bullsquid Four Eyes Fix
  
• Credits theme in Lambda Core finale
  
• Cleaned-Up Lowres Concrete Texture
  
• Crossbow Scope Redone
  
• Definitely Larger Subs v1.01
  
• Drunk's Blood Mod
  
• Emergency Flare Texture Fix
  
• English Spelling Fixes
  
• Extended Captions and Dialogue
  
• FAF Radioman Heroic Death
  
• Fixed "Thunderclap" Radio Conversation
  
• Forget About Freeman music remix
  
• Glowing Vortigaunt Murals
  
• Gman - Classic Speech Enhanced
  
• Gordon's Locker Revamped
  
• Improved MP5 World Model
  
• Inbound Revamped
  
• More Monitors Mod
  
• Non-Windows HEV Boot
  
• Original H.E.V. Improvements
  
• Osprey Fixes
  
• Permanent Bloodpools (Optional) refer to addon description for improvements
  
• RNG Supplypod Notes
  
• Slightly Improved Underwater Shader
  
• Tau Cannon Sketch Fix
  
• The Dinosaur Conundrum
  
• Unused Sounds Restoration (Updated!) (maybe works)
  
• We've Got Hostiles remix

The following addons require you to copy them from their workshop folder into your custom folder using the method above.

• Black Mesa Weapon Fixes
  
• Improved Choreography
  
• [Optional Patch] BMCE Addon - Hazardous Environment Combat Unit Remastered decal crash fix MUST FIRST install "BMCE Addon - Hazardous Environment Combat Unit Remastered" or else this won't work

The following addons require you to visit its description to know how to install them.

• "World's Smallest Cup" Fix
  
• BMCE - Black Mesa Character Expansion (Use the "BMCE HECU Soldiers" Misc File option)
  
• BMCE Addon - Black Mesa Character Expansion Revised
  
• BMCE Addon - Hazardous Environment Combat Unit Remastered
  
• May 2003 Calendar Edit

The addon "BMS Classic" is a complete overhaul of the campaign and overrides almost every level. Because of this, other addons that override map files will not be compatible. This includes BMCE Overhauls, OAR Uncut, We've Got Hostiles Vent (this includes that anyways), and VOX restorations. The only exception to this is for the Inbound Revamped addon since BMS Classic does not alter any Inbound levels. There might be an addon in the future that combines these two mods together for compatibility, in which case I will update this collection. Thanks, that's all.