First install Half-Life 2 , Half-Life 2: Episode 1, Half-Life 2: Episode 2 via their relevant Steam store pages.

Half Life 2: https://store.steampowered.com/app/220/HalfLife_2/
Half-Life 2: Episode 1: https://store.steampowered.com/app/380/HalfLife_2_Episode_One/
Half-Life 2: Episode 2: https://store.steampowered.com/app/420/HalfLife_2_Episode_Two/

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Or just get the Orange Box which includes those titles: https://store.steampowered.com/sub/469/

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Optionally, install Half-Life 2: Lost Coast: https://store.steampowered.com/app/340/HalfLife_2_Lost_Coast/

Install the Half Life 2 update to your Steam library:
https://store.steampowered.com/app/290930/HalfLife_2_Update/

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This is a completely free and extensive community-developed update for Half-Life 2 featuring beautiful lighting, countless bug fixes, and a brand new Community Commentary Mode.

In Steam, hover over 'Library' and select 'Tools':

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Scroll down, right click 'Source SDK Base 2013 Singleplayer' and install it:

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Once installed, go back to the 'Source SDK Base 2013 Singleplayer' in your 'Tools' list, right click it and select 'Properties':

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On the 'Betas' tab, click the drop down list and select 'incoming'. Then close the window:

Go to the MMOD webpage on moddb.com:
https://www.moddb.com/mods/hl2-ep2-enhased-mod

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Scroll down and download the latest version of the MMOD (at the time of writing it was v1.1):

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Right click on the downloaded .zip file and choose 'Extract All' and hit enter on your keyboard to extract the file:

In the downloaded 'Release_1.1.3' folder, go in to 'Release 1.1', and then in to 'HL2MModv1.1' and copy all 6 folders from this folder:

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Go back to your Steam library, right click on 'Half Life 2' and choose 'Properties':

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Click on 'Local Files' and then 'Browse Local Files':

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Click on the 'steamapps' folder:

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Go in to the 'sourcemods' folder:


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And paste the folders you copied earlier in to that folder:

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Note:
Sourcemods folder and all HL2 games have to be installed on same hard drive.
If you don't see a sourcemods folder you can just create one yourself, that will work fine.
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IF you have Steam installed on one drive, but games library on other drive then mmods won't show up after restart, here's solution:

1. Exit steam
2. IMPORTANT: Delete sourcemods folder from steam client folder
3. Hit Windows key on keyboard and type 'cmd', then right click command prompt and choose 'Run as Administrator'
4. Type: mklink /J 'the location you have Steam and sourcemods folder' 'the location of your sourcemods folder on the drive your games are installed on'

Sample: mklink /J "C:\Program Files (x86)\Steam\steamapps\sourcemods" "D:\SteamLibrary\steamapps\sourcemods"

Hit enter on your keyboard
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RESTART STEAM!!


I'll say again, RESTART STEAM!!

In your Steam library you will now see MMOD versions of Half Life 2:

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Start which ever version of the mod you want to play.

THATS IT!!

Also check my YouTube channel for more tutorials and other randomness:
https://www.youtube.com/f4cepa1mx0

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