EVERYONE IS G-MAN! mod for Half-Life 2 - ModDB

This Mod Replaces Every Npc With Gman! its like G-invasion!

New Gman HL2 for HL1DM addon - Half-Life - ModDB

Half Life Alyx Gman [Black Mesa] [Mods]

Hell Gman addon - Half-Life 2 - Mod DB

Someone Is Demaking Infamous Fan-Made Half-Life Game Hunt Down The Freeman

Half-Life 2 mod turns Valve's FPS into an Amnesia-style horror game

Synergy on Steam

Putting the Half-Life 2 G-Man into Half-Life: Source

Half-Life: Alyx fully playable without VR even on Steam Deck thanks to a mod

Creepy Half-Life 2 Mod Transforms it Into a Horror Game with G-Man Never Leaving Your Side - TechEBlog

Scrapped 1997 Version of Half-Life Reappears as Enhanced Mod

Half-Life 1 Has Been Remade As A Top-Down Roguelike - GameSpot

Steam Workshop::Half-Life 2 but G-Man won't leave you alone (Demo)