Update: Version 1.2 released Jan 13, 2019.
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Steam How to install Half Life 2 MMOD

Half Life 2 MMOD [Install Guide]

What is the Half Life 2 MMOD?

From the site:

The goal of Half-Life 2 : MMod is to enhance and expand gunplay, combat mechanics and the immersion factor by giving the Player more options and combat opportunities as well as refine how the Player handles his arsenal. Half-Life 2 : MMod also offers minor AI enhancements, extended abilities for combine soldiers, multiple bug fixes, enhanced visuals, VFX re-design, sound redesign and much much more, while keeping nearly every new feature in the mod totally optional.

More Info: https://www.moddb.com/mods/hl2-ep2-enhased-mod